Wakatobi National Park
Wakatobi National Marine Park covers an entire Wakatobi District and covers an area of one and a half million hectare. The name Wakatobi itself is a portmanteau of four biggest islands in Tukangbesi Islands; Wangi-wangi, Kaledupa, Tomia, and Binongko. This park is listed as tentative World Heritage Site since 2005.
Simply said, Wakatobi offers the best diving experience unlike anywhere else because it has the highest number of reef and fish species in the world. The 143 islands within the area are forming a large barrier reef, second only to the Great Barrier Reef of Australia.
reference: Wakatobi, the Great Barrier Reef of Indonesia (travelingyuk.com)