Mu Ko Lanta National Park consists of several islands covering 134 km². It was established in 1990 as a marine park. It is located in the southern part of Krabi Province. It consists mainly of rugged hills covered with rainforests of 20 km² and beach forests along the lines The coastal areas of Ko Lanta Yai and Ko Ngai, and some of its islands are covered with mangrove forests. This park is a popular diving site for both beginners and professional divers, as it offers the possibility to see some of the exciting tropical marine life found in the Andaman Sea.