The Caye (pronounced as "key", meaning an island, derived from Spanish: cayo) is about 40 kilometres (25 mi) long from north to south, and about 1.6 kilometres (1 mi) wide. It was named after large lumps of ambergris which washed ashore here.
The Belizean island, where it has not been modified by man, is mostly a ring of white sand beach around mangrove swamp in the centre.
San Pedro Town is the largest settlement and only town on Ambergris. There are also a number of small villages and resorts. Captain Morgan's and Mata Chica resorts north of San Pedro played host to the first season of Fox's Temptation Island in 2000, aired in 2001. More recently, the availability of skydiving during the winter has become a draw for tourists so inclined.