In the warm shallows of the Persian Gulf, off the coast of a desert island, grows a forest in the sea. Twice a day the tide comes in and drowns it until only the green crowns float on the turquoise water; twice a day the tide goes out and a whole forest of bare grey roots rises back into the air. The trees drink salt water and live — filtering the sea into something they can survive on. The same forest, six hours apart, is two different worlds, and it carries the name of the greatest physician the Persian world ever produced.
"By some accounts the hara sprang from the tears of Adam — and its name, Avicennia, is the name of the physician who tried to heal the world."
Qeshm lore & the tree's Latin name, after Avicenna (Ibn Sina)
Off the northwest coast of Qeshm Island, in the warm shallows of the Persian Gulf, the sea grows a forest. From a boat at high tide you move through open water dotted with thousands of low green crowns, as if a woodland had been flooded to the neck — branches and leaves floating on a turquoise surface, their trunks and roots hidden beneath you. These are the Hara forests (جنگلهای حرا), the largest mangrove forest on the Persian Gulf, and one of the strangest living landscapes in a country full of them.
The strangeness is that the forest will not stay still. Mangroves grow in the intertidal zone — the strip of coast that is sea for half the day and land for the other half — so the Hara forest is rebuilt twice daily by the tide. At high water it is a half-drowned archipelago of floating green. Six hours later the water has drained away and the same place is a dense, grey, breathing thicket: tens of thousands of finger-like roots standing up out of the glistening mud, the trees suddenly three or four metres tall on legs of tangled wood. You can visit the identical patch of coast at noon and at dusk and stand in two completely different forests.
And the trees should not be there at all. The dominant species, Avicennia marina — the hara (حرا) — lives in salt water that would kill almost any other plant. It survives by behaving like a living desalination plant: its roots take in seawater but block most of the salt, and what gets through is pushed out through the leaves, which can taste of it. To breathe in waterlogged, oxygen-starved mud, it sends up vertical aerial roots (pneumatophores) that give the low-tide forest its eerie, bristling floor — a tree that thrives, improbably, exactly where no tree should.
Mangroves are tropical and subtropical coastal forests, and the Persian Gulf sits near the cool, dry northern edge of where they can grow — which makes the Hara forests something close to a frontier population, hardy survivors at the limit of the species' range. The Qeshm stand, around 2,400 hectares, is the largest single Avicennia mangrove on the Persian Gulf and the most important of Iran's eight Hara forests, which total some 7,500 hectares nationwide. The whole system lies in and around the Mehran River delta and the tidal channels of the Strait of Khuran, between Qeshm and the mainland — a maze of mud-flats, small islands, shallow coves, and mangrove channels. In 1972 it was made a protected area, and in 1977 UNESCO designated it a Man and the Biosphere Reserve, recognising a place where a fishing-and-grazing human economy and a globally important ecosystem have to share the same shallows.
A mangrove does what no ordinary tree can: it lives with its feet in the sea and its trunk in air that vanishes twice a day. Four adaptations make it possible.
A mangrove is not just strange trees; it is one of the most productive nurseries on Earth. The submerged roots make a sheltered, food-rich maze that countless creatures depend on — which is why a forest the size of a small town underwrites the life of a whole sea. Six things the Hara forest holds.
One species builds everything: the salt-filtering, air-breathing hara, 3–8 metres tall, bright green above and grey-rooted below. Its leaves are nutritious enough that Qeshmi herders have long cut them, in strict limits, to feed livestock through the dry season — fodder roughly the equal of barley.
The flooded root-maze is a shelter where young fish and shrimp hide and feed safe from open-water predators. The Hara mangroves underpin a large share of the Persian Gulf's marine spawning — the reason the forest matters far beyond its own shallows, and the basis of the local fishery.
The forest is a magnet for birds — herons and egrets stalking the shallows, cormorants, and, in autumn and winter, flocks of migratory flamingos, pelicans, and waders that rest and feed here. Qeshm and its mangroves sit on a major flyway, and the channels are among the best birdwatching in the Gulf.
The warm water around the roots is feeding and breeding ground for sea snakes — genuinely venomous, generally shy, and a reminder that this is a living, wild marine system, not a garden. Crabs, mudskippers, molluscs, and shrimp crowd the mud at low tide.
The wider Khuran shallows and nearby Qeshm coasts host sea turtles and, offshore, dolphins — part of the rich marine life the mangrove feeds. The forest is the green engine at the centre of a whole stretch of living Gulf.
The forest's least glamorous part does the heaviest work: the tidal mud and root mat trap sediment, store large amounts of carbon, buffer the coast against storms, and build the very ground the next generation of trees will seed into. A mangrove is, slowly, making its own land.
It is one of the richest, most concentrated patches of life in the whole Persian Gulf — a single tree species creating the conditions for hundreds of others. Lose the mangrove and you do not lose one forest; you pull the floor out from under a sea.
Mangroves are among the most valuable ecosystems on Earth and among the most threatened, and the Hara forests are no exception. They sit, moreover, in a difficult place: the Strait of Khuran is a working waterway, the Persian Gulf is one of the most industrialised and warming seas on the planet, and Qeshm is a fast-developing free-trade island. The pressures stack up.
The threats are the familiar ones for mangroves worldwide, sharpened by this setting: pollution from shipping, ports, and coastal industry; dredging and construction in the channels and along the shore; reduced freshwater and sediment reaching the delta; climate change and sea-level shift, which a fixed intertidal forest cannot easily migrate to escape; and, more recently, pressure from tourism itself — too many boats, engine pollution, noise, and litter in a fragile nursery.
Tourism is the mangrove's double edge. On one side, boat trips give Qeshm's coastal villages a living income that depends on the forest being healthy and standing — a powerful reason to protect it, and a far better one than cutting it for fodder or filling it for development. The geopark and biosphere status, and the visitors they bring, are part of why the Hara forest is still here.
On the other, a mangrove loved badly is a mangrove harmed. Fleets of motorboats churning the channels at peak season bring fuel and oil into the water, noise into a bird nursery, and litter into the roots; boats that run too close or too fast damage the trees and disturb feeding flocks. The same activity that funds protection can, unmanaged, become one more pressure.
Untamed Iran's position is the obvious one: go, because visiting responsibly gives the forest economic value and a constituency — but go gently, with operators who cut their engines, keep their distance, and carry their rubbish out. The forest can carry careful visitors. It cannot carry careless ones in their thousands.
It is legally protected — a protected area since 1972, a UNESCO biosphere reserve since 1977, with commercial use limited to fishing, controlled fodder-cutting, and tourism. But protection on paper is not the same as a healthy sea around it, and the Hara forest's long-term future is tied to the health of the whole hard-used Persian Gulf.
There is only one way into the Hara forest, and it is the right one: a boat. There is no land access — you cannot walk into a forest that is underwater half the time — so you go down to a village dock, step into a small open boat with a local boatman, and motor out across the shallows toward a low green line on the water.
Everything depends on the tide, and getting it right is the whole art of the visit. Come at high tide and the channels are full: the boatman threads you between the floating crowns of the trees, branches close enough to touch on either side, the water a flat turquoise lane winding deeper into a half-drowned wood. Herons lift off the canopy ahead of you; fish flicker under the bow; the only sound is the engine, then — when the boatman cuts it — birds, water, and the click and bubble of a forest soaking. Come at low tide and the boats cannot enter at all; the forest is a bristling grey thicket standing on exposed mud, extraordinary to see but impossible to enter. So you ask about the tide tables before you book, and you plan the day around the water.
The docks are at the villages on Qeshm's northwest coast — Soheili, Tabl, and the harbour town of Laft — and a trip runs an easy one to two hours. It asks nothing of you physically; the reward is not exertion but the strangeness of gliding through a wood that the sea will swallow by evening. Go at first light or late afternoon, both for the low gold light and to miss the midday boats, and you get the forest close to its quietest.
The Hara forest is one chapter of Qeshm — a UNESCO Global Geopark island that packs an improbable amount of geology, coast, and culture into a short drive. The natural pairings are close.
The atmospheric old harbour town beside the mangroves — a forest of wind-towers (badgirs), hundreds of ancient circular wells, dhows in the bay, and Naderi Castle. The perfect cultural half to a mangrove morning.
Across the island, an eroded sandstone labyrinth carved over two million years — the geopark's flagship landform, and the desert counterpart to the watery mangroves. Covered in our Stars Valley article.
One of the longest salt caves in the world, through a salt dome on the island's southwest — the geopark's great underground marvel. See our Namakdan Cave article.
A small island off Qeshm's south coast, reached by boat, known for dolphins in its waters, silver-sand beaches, and a relaxed Gulf-island calm. A natural add-on to a Qeshm boat day.
The famous coloured-earth island a short ferry away, its hills striped in dozens of mineral hues. The Gulf's most surreal landscape, and an easy pairing. See our Hormuz Island article.
The Hara forest does not stop at Qeshm — it continues across the strait to Khamir port and around Pohl and Hormuz, part of the same delta system. Qeshm holds the largest and most visited stand, but the green shallows run for miles.
For all that it looks like a forest, the Hara is really a marine ecosystem — its life is mostly fish, birds, and the creatures of the mud, not land animals. But the sheer concentration of that life, fed by the mangrove, is the point.
The flooded roots are a nursery: young fish and shrimp shelter and feed there in numbers that supply much of the wider Gulf, the base of both the food web and the local fishery. Above the water the forest is a bird haven — resident herons, egrets, and cormorants year-round, and in autumn and winter great numbers of migratory flamingos, pelicans, and waders dropping in on the flyway. In and around the channels live sea snakes, crabs, mudskippers, and molluscs, while the surrounding Khuran shallows and nearby coasts hold sea turtles and offshore dolphins. The mangrove itself does the quiet structural work — storing carbon, trapping sediment, and shielding the coast from storms. It is a single tree species holding up an entire stretch of living sea.
Treat the forest as the fragile nursery it is: go with boatmen who cut their engines and keep their distance, never litter or pour anything into the water, do not break or pull at the trees, and keep well back from feeding birds and from any sea snake you see. The life here is not a show — it is a stressed, globally important system at the cool edge of where mangroves can survive, and the lightest possible visit is the only responsible one.
Untamed Iran rates each destination on two separate dimensions — Adventure, the physical demands a place involves, and Legacy, the weight it carries in landscape, atmosphere, and life. A Hara visit is a gentle guided boat trip, so its Adventure score is low. Its Legacy is high: the largest mangrove on the Persian Gulf, a UNESCO biosphere, and a forest that vanishes and returns with every tide.
You leave the dock at Soheili on a rising tide, and for a few minutes it is just open turquoise water and the slap of the hull and the heat. Then a low green line ahead resolves into trees, and the boat slows and turns into a gap between them, and the open Gulf is suddenly gone. You are in a channel barely wider than the boat, green crowns leaning in on both sides, their trunks somewhere beneath you under the clear water. A heron lifts off the canopy ahead and beats away down the corridor.
Then the boatman cuts the engine. And in the silence the forest comes up around you — the trickle and suck of water moving through ten thousand submerged roots, the creak of branches, the cries of birds you cannot see, the small splash of a fish. You are floating inside a wood, on water that did not exist here six hours ago and will be gone again in six more. You reach over the side and the water is warm and salt, and these trees are drinking it and living. Trail your hand along a leaf and it may come away faintly white — the salt the tree pushed out to survive.
That is what stays with you: the strangeness of a forest with no ground, a wood that breathes with the tide, holding up a whole sea of fish and birds out here in the salt where nothing should grow. And the small, exact fact that the tree doing all this answers to the name of Avicenna. You came to see trees in the water. You leave having sat inside a forest while it dissolved quietly back into the Gulf around you.
It lives on every line at once — where the sea meets the land, fresh meets salt, air meets water — and crosses all of them twice a day. A forest with no ground, holding up the life of a whole sea, bearing the name of Avicenna. You do not walk into it. You float through it, on water that will be gone by evening.
You don't have to set out from Bandar-e Khamir or Laft to reach the Hara. Wherever you are on Qeshm, you can wave down one of the motorboats that work the shore, agree a price, tell them which way you want to go, and that's that.
That is what I did, from Naz Beach. I'd already agreed a fare to the forest when the boatman made an offer: would I like them to take me out to Naz Island first by camel, and pick me up there? It would cost a little more — a local's suggestion usually does, and it is always worth it. I said yes at once. So: over a kilometre on the back of a camel, out through the shallows toward one of the three Naz islands, the animal wading up to its lower neck in the sea. Half an hour up there, and I smoked one of the best and most singular cigarettes of my life — though that one belonged to Naz Beach, not to the Hara.
Then they collected me by boat and we turned toward the forest. Fortune was with me that day: a few hundred metres short of the trees, a pod of dolphins surfaced thirty or forty metres off and began to play — leaping clear of the water, racing us, a sight far past anything I could put into words. I asked the driver not to hurry.
And there, beside the dolphins of the Persian Gulf, a few hundred metres before I ever reached the mangroves, I lit the Hara cigarette. It was magnificent. Magnificent.
Prime. The Persian Gulf's brutal heat has eased and the days are warm, clear, and comfortable on the water — the right season for a boat trip, and the time migratory birds (flamingos, pelicans, waders) crowd the channels. The best window by far.
The shoulder. Still pleasant before the summer furnace arrives, the mangroves in full green leaf, and fewer visitors than the winter peak. A good month, warming fast toward its end.
Hot and very humid — Gulf summer, with fierce sun on open water and energy-sapping mugginess. The forest is thriving and the trees flower and fruit in mid-summer, but a midday boat trip is punishing. Go at dawn if you must go at all.
More important than the season: time your trip with high tide, when the channels fill and boats can glide between the trees. At low tide the boats cannot enter the forest. Ask locally for the day's tide times when you book — it makes or breaks the visit.
⏰ Plan the day around high tide, and aim for early morning or late afternoon — the light on the turquoise water is best then, the heat is bearable, and you miss the midday boat traffic. High water plus low sun is the Hara forest at its finest.
The Hara forest is one of the easier wild places in this collection to reach — it's a short boat trip off a well-connected island — but it rewards a little planning around the ferry, the boat, and above all the tide. Prices move with the rial, so treat any figure as an order of magnitude.
The largest and most visited Hara mangroves are off the northwest coast of Qeshm Island in the Persian Gulf, near Soheili and Tabl villages and Laft port. Qeshm is reached by ferry from Bandar Abbas or by air; the forest is then explored only by boat, on guided trips of 1–2 hours from the village docks. There is no land access into the forest.
Tidal mangrove forests — woodland that grows in the sea. Dominated by the salt-tolerant tree Avicennia marina (locally hara), they grow in the intertidal zone, so they are submerged at high tide and exposed at low tide. The Qeshm stand, around 2,400 hectares, is the largest Avicennia mangrove on the Persian Gulf and the heart of a UNESCO Biosphere Reserve.
It is, in effect, a living desalination plant. The hara survives in salt water that would kill almost any other tree, by filtering most of the salt out at its roots and excreting the rest through its leaves. Its roots also send up finger-like aerial roots (pneumatophores) that stick out of the mud to breathe at low tide. It grows about 3–8 metres tall.
The genus name Avicennia honours Avicenna (Ibn Sina), the great 11th-century Persian physician and polymath — so the tree that grows in the salt water of the Persian Gulf carries the Latinised name of one of the towering figures of Persian and Islamic science. A local legend separately traces the plant to the "tears of Adam."
Visit between mid-autumn and spring (roughly November to April), when the Gulf climate is mild; summer is hot and humid. Crucially, time your boat trip with high tide, when the channels fill and you glide between the floating crowns of the trees — at low tide the boats cannot enter. Ask locally about tide times when booking. Autumn and winter also bring migratory birds.
The mangroves are a nursery and feeding ground for a great deal of life: many fish and shrimp species (the forest underpins much of the Gulf's marine spawning), crabs and molluscs, sea turtles and sea snakes in the surrounding water, and large numbers of birds — herons, egrets, flamingos, pelicans, cormorants, and migratory waders that winter here. It is one of the richest wildlife sites in the region.
Yes. Like mangroves worldwide they are sensitive to pollution, coastal development, dredging and shipping in the Strait of Khuran, reduced freshwater inflow, climate change and sea-level shifts, and pressure from over-visitation and boat traffic. They are legally protected as a biosphere reserve, but remain a fragile ecosystem under real and growing pressure.
The Hara forest is one face of Qeshm, a UNESCO Global Geopark island that turns out to be one of the great concentrations of strange landscape in Iran. The natural next steps are close: the eroded sandstone maze of the Stars Valley and the vast underground world of the Namakdan salt cave are the geopark's other marvels, and a short ferry away the mineral-striped hills of Hormuz Island are the Gulf at its most surreal. But the Hara forest also belongs to a quieter thread running through this whole collection — the places that survive at the extreme edge of what life can take, and make a home of it. The salt caves endure in salt; the desert reserves hold the last cheetahs in emptiness; and here a forest takes the one thing that kills almost everything else — salt water — and builds an entire ecosystem on it. Of all Iran's wild places, it may be the clearest proof that life does not just survive the hardest conditions; sometimes it builds its whole world out of them.
Untamed Iran prefers official, scientific, and first-hand sources, and separates established fact from local legend. The geography, the tree's biology, the wildlife, and the access detail above draw on the following:
Facts last reviewed June 2026. Established: the Hara forests are tidal mangroves dominated by Avicennia marina; the Qeshm stand (~2,400 ha) is the largest Avicennia mangrove on the Persian Gulf and part of a UNESCO Biosphere Reserve (designated 1977; protected since 1972); the trees survive by filtering salt from seawater and breathe through aerial roots; the forest is submerged at high tide and exposed at low tide; and it is a vital nursery for Gulf marine life and a haven for migratory birds. The genus name Avicennia does honour Avicenna (Ibn Sina). Legend, not fact: the "tears of Adam" origin is local folklore, presented as such. Figures to treat as approximate: areas are variously given (the Qeshm stand ~2,400 ha; national Hara forests ~7,500 ha; some sources cite much larger protected-zone hectarages that include surrounding marine and wetland area), and the "~80% of the Gulf's spawning" figure is widely repeated but hard to verify precisely. Tide times, boat operations, and access change — confirm locally before you go.