Ko Phi Phi, in the Andaman Sea, is made up of two islands: Phi Phi Don, the larger of the two, to the north, and Phi Phi Le to the south. Known first and foremost for being part of one of the best diving sites in Thailand, the archipelago also boats idyllic beaches and a whole range of activities to satisfy the hordes of tourists who come to Ko Phi Phi en masse to enjoy its splendid setting and its now-threatened natural environment.