Danger Island

Indian Ocean, United Kingdom

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Danger Island, located in the British Indian Ocean Territory (BIOT) within the Chagos Archipelago, is the westernmost and southernmost island of the Great Chagos Bank—the world's largest coral atoll structure at coordinates 6°22′60″S 71°14′20″E.

This uninhabited, flat 163-acre (66-hectare) islet, roughly 2 km long and 400 meters wide, features tall coconut trees and a hazardous surrounding reef extending 2-3 miles south-southwest, likely earning its name from the lack of safe anchorage that endangers approaching vessels.

Designated a Strict Nature Reserve since 1998 and an Important Bird Area, it supports significant populations like 3,500 breeding pairs of red-footed boobies and 11,000 pairs of brown noddies, lying 16 km from the nearest land at Sea Cow Island.