Henderson Island (formerly also San Juan Bautista and Elizabeth Island) is an uninhabited raised coral atoll in the south Pacific Ocean. It is one of the few atolls whose ecosystems have been relatively unaffected by human contact. Ten of its 51 flowering plants, all four of its land birds and about a third of the identified insects and gastropods are endemic, a remarkable diversity given the island’s size.
Measuring 9.6 kilometres (6.0 mi) long and 5.1 kilometres (3.2 mi) wide, it has an area of 37.3 square kilometres (14.4 sq mi) and is located 193 kilometres (120 mi) northeast of Pitcairn Island. It is unsuitable for agriculture and has little fresh water. There are three beaches on the northern end and the remaining coast comprises steep, mostly undercut, cliffs up to 15 metres (49 ft) in height.
In 1902 Henderson was annexed to the Pitcairn Islands colony, now a South Pacific British Overseas Territory. It was designated a World Heritage Site by the United Nations in 1988.
- Henderson Island (formerly also San Juan Bautista and Elizabeth Island) is an uninhabited raised coral atoll in the south Pacific Ocean.