This island forms the most southern district of Krabi province. It was known long ago by its name in the Malay language, Pulao Satak, which means Long Beach Island. Later, many Thais, both Buddhist and Muslim, came to live on the island making the island known as the island of “a million eyes”, which is the literal translation of Lanta in Thai. Others hold that the name is derived from Javanese "lan-tas", and means a fish grill (which is built of wood with a square grill on top where the fish are set in a circle). Several islands, including Lanta Yai, are considered to be in the National Park.

The island geography is mountainous and rugged, especially near the southern tip; some beaches are gravelly, while the others have fine white sands.

A clan of Chao Ley, or “Sea Gypsies” is resident on Koh Yao Yai and they preserve many of their ancient customs and ceremonies; e.g. the setting of ceremonial boats adrift to bring good luck and prosperity on the full moon nights of the sixth and eleventh month. This and other features of their lives are opened to view.

Almost all the attractions are located in the west shores of Lanta island. There are various activities for your favorite choices, for example, trekking, diving, sea canoeing, swimming, sight-seeing the old town and the lighthouse at the southernmost side of the island.