Low weathered coral rock topped with casuarina trees rises above the pale shallows of the Aldabra lagoon.
Heritage

Aldabra Atoll: Visitor and Heritage Guide

Four coral islands around a lagoon, so hard to reach that they were never spoiled. Some 152,000 giant tortoises live there, the world's largest population.
  • Country Seychelles
  • Category Heritage
  • Reviewed 20 August 2026
  • Sources 3
  • Length 1 min read

Credit Ron Van Oers, CC BY-SA 3.0 IGO, via Wikimedia Commons

Aldabra was inscribed on the World Heritage List in 1982, under criteria seven, nine and ten. It is one of two World Heritage properties in Seychelles and both of them are natural.

What it is

UNESCO describes an atoll comprising four large coral islands which enclose a shallow lagoon, the group itself surrounded by a coral reef.

Then it makes the argument that the whole inscription rests on: because of the difficulties of access and the atoll's isolation, Aldabra has been protected from human influence, and it therefore retains some 152,000 giant tortoises, the world's largest population of this reptile.

That is a conservation status achieved by remoteness rather than by management, which is rarer than it sounds and more fragile than it looks.

Practical

If a trip to Aldabra is the reason for your journey, arrange it through the operators and authorities who manage access rather than assuming it can be added to an island-hopping itinerary.

  • Aldabra lies in the outer islands, far from Mahé and the granitic group where visitors normally go.
  • UNESCO itself describes the difficulty of access as the reason the atoll survives, which should set expectations about visiting.
  • It is the subject of the only State of Conservation report on Seychelles' UNESCO record, dating from 1986.
  • Anyone traveling in the wider western Indian Ocean by sea should read the FCDO's note that piracy in the region has decreased but that some risk remains, especially off the coast of Somalia.

Sources

  1. UNESCO: Aldabra Atoll, inscribed 1982
  2. UNESCO: World Heritage properties in Seychelles
  3. UK FCDO: Seychelles safety and security

Site description, tortoise figure, criteria and inscription date read from UNESCO on 20 August 2026, together with the Seychelles states parties page. The tortoise figure is given with UNESCO's own hedge, "some". Maritime note from the UK FCDO Seychelles safety and security page.