These three coral atolls lie approximately 300km from Broome in the Indian Ocean, on the edge of Australia's continental shelf, and have a reputation for some of the best diving in the country. Protected by a marine park, there's over 600 species of fish and 200-plus different varieties of coral. At a good 12-hour cruise from land, the shoals only see a minute number of visitors each year. Several Broome operators offer multi-night cruises for experienced divers.
The shoals also attract large numbers of migratory sea birds.