Aldabra Atoll


World Heritage Identification Number: 185

World Heritage since: 1982

Category: Natural Heritage

Transboundary Heritage: No

Endangered Heritage: No

Country: 🇸🇨 Seychelles

Continent: Africa

UNESCO World Region: Africa

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Aldabra Atoll: A Unique Coral Atoll in the Indian Ocean

The Aldabra Atoll, located approximately 1,120 kilometers (700 miles) southwest of the capital city of Victoria on Mahé Island, is a remarkable natural wonder situated in the heart of the Indian Ocean. This coral atoll, which forms part of the Aldabra Group of islands within the Outer Islands of the Seychelles, was inscribed as a UNESCO World Heritage Site in 1982 due to its exceptional biodiversity and pristine condition, largely untouched by human influence.

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UNESCO Description of the World Heritage Site

The atoll is comprised of four large coral islands which enclose a shallow lagoon; the group of islands is itself surrounded by a coral reef. Due to difficulties of access and the atoll's isolation, Aldabra has been protected from human influence and thus retains some 152,000 giant tortoises, the world's largest population of this reptile.

Encyclopedia Record: Aldabra

Aldabra, the world's second-largest coral atoll, is located east of the continent of Africa. It is part of the Aldabra Group of islands in the Indian Ocean that are part of the Outer Islands of the Seychelles, with a distance of 1,120 km (700 mi) southwest of the capital, Victoria on Mahé Island. Initially named by Arab seafarers for its harsh environment, Aldabra became a French colony dependency in the 18th century, leading to the exploitation of its natural resources, particularly giant tortoises. After passing through British hands, Aldabra faced potential military use in the 1960s, but international protests resulted in its protection. The atoll boasts unique geography, featuring the world's largest raised coral reef and a large shallow lagoon. Aldabra's history involves human impact, including failed agricultural ventures.

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Additional Site Details

Area: 35,000 hectares

UNESCO Criteria: (vii) — Contains superlative natural phenomena or beauty
(ix) — Outstanding example representing ecological and biological processes
(x) — Contains most important habitats for biodiversity

Coordinates: -9.416666667 , 46.41666667

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Image of Aldabra Atoll

© Simisa, CC BY-SA 3.0 Resized from original. (This derivative is under the same CC BY-SA license.)

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Country Information: Seychelles

Flag of Seychelles

Official Name: Republic of Seychelles

Capital: Victoria

Continent: Africa

Population (2024): 121,354

Population (2023): 119,773

Population (2022): 119,878

Land Area: 460 sq km

Currency: Seychellois rupee (SCR)

Country Data Sources

Last updated: January 18, 2026

Portions of the page Aldabra Atoll are based on data from UNESCO — World Heritage List Dataset and on text from the Wikipedia article Aldabra, licensed under CC BY-SA 4.0. Changes made. Additional original content by World Heritage Explorer (WHE), licensed under CC BY-SA 4.0. WHE is not affiliated with UNESCO or the World Heritage Committee. Legal Notice. Privacy Policy.

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