Nan Madol

IslandsPohnpei,Micronesia

A stone city built on a Micronesian coral reef: a hundred artificial islets of basalt columns stacked crosswise like logs, with canals instead of streets.

September·Quiet month

Aug–Dec

Typhoon season is at its height, most storms falling August to November, and December stays wet; Pohnpei at 7°N lies in the storm belt, so systems can pass close. The site never closes — reach it between fronts and watch the forecast.

Year-round The basalt-column islets and canals of the Venice of the Pacific stand year-round. You reach them by small boat, or wade across at low tide. Rain is heavy in every month, easing only from January to March.

Nan Madol is an entire stone city built on a coral reef. It covers nearly a hundred artificial islets, which carried palaces, temples and tombs. The builders stacked long basalt columns crosswise on top of one another, the way logs are laid in a log cabin, and the largest of those columns weigh up to ninety tonnes. Canals run where streets would normally be, which is why the name means the spaces between and travellers call the site the Venice of the Pacific. Nobody carved those columns; they came out of the ground already that shape. How islanders floated and hauled them from quarries across Pohnpei, without wheels, pulleys or draft animals, is still not fully explained. This was the capital of the Saudeleur dynasty, which unified the island around 1180 CE and ruled for roughly five centuries. You reach the islets by small boat across the still green lagoon, or on foot when the tide drops low enough to wade the channels. Up close, the black basalt walls rise straight from the water, furred with moss and shaded by mangroves, and the quiet is almost complete. At the heart of the site stands Nandauwas, the royal mortuary, whose crosswise-laid columns reach up to seven and a half metres. Its courtyard, where the Saudeleur kings were entombed, is the grandest space in the city, and nobody has lived beside these stones for four hundred years. The dynasty fell around 1628, and the reef has been reclaiming its capital ever since. In the same year it was honoured, Nan Madol was also placed on the List of World Heritage in Danger: silt is choking the canals, mangroves are prising the stones apart, and rising seas press in. Visiting still means asking the traditional landowners' permission.

Worth knowing

Good to know

Entry needs the traditional landowners' permission and a small fee, so come with a local guide — it smooths the way in and unlocks the story behind the stones.
Aim for low tide, when the channels drain enough to wade between the islets on foot; check the day's tide table first, as high water leaves only the boat.
The basalt is mossy and slick, so wear grippy water shoes; the mangroves breed mosquitoes, so cover up and bring repellent for the still, humid air.
Light is kindest early and late — soft morning or low afternoon sun brings out the black stone, while the midday glare is tiring in the tropical humidity.
Pohnpei is among the rainiest islands on Earth and wet year-round, so pack a waterproof layer and a dry bag or cover to protect your camera.

Things to do

1
Move through the canals, by boat or on foot at low tide
You reach the islets by small boat across the still green lagoon, gliding through narrow channels where black basalt walls slide past on either side in the shade of the mangroves. It is why the place is called the Venice of the Pacific. When the tide falls the channels drain and you can wade from one islet to the next instead, coral crunching underfoot and ancient walls closing in. After one of Pohnpei's near-daily showers the stone turns glossy and mist lifts off the water.
2
Trace the log-stacked basalt walls
Up close, the walls resolve into thousands of long basalt prisms laid crosswise like the logs of a cabin, one course over another with no mortar between them. Run your eye along a single column and the patience of building an entire city this way, block by many-tonne block, sinks in.
3
Stand in the heart of Nandauwas
Nandauwas, the royal mortuary and grandest islet, is ringed by walls of stacked columns rising over seven metres. Step into its central courtyard, where the Saudeleur kings once lay entombed, and the hush and the sheer mass of stone press the age of the place onto you.