Mu Ko Lanta National Park is a national park in the southern part of Krabi Province, Thailand, consisting of several islands. The two largest islands are Ko Lanta Noi and Ko Lanta Yai. Although both are inhabited, Ko Lanta Yai is the primary tourist destination. The park was established on 15 August 1990 A clan of Chao Ley, or "sea gypsies" lives on Ko Lanta Yai.