Phi Phi's warm, clear water makes it one of Thailand's better dive areas. Limestone stacks rise straight out of the sea, and the rock below is cut with caves and reefs down to around 12 metres. Dive tours run to Garang Heng, Hin Pae, the King Cruiser Wreck, Hin Dot, Koh Bida Nok and Koh Bida Nai, taking in reef fish, submerged caves and wreck sites.