The Mu Koh Lanta Marine National Park protects 15 islands in the Koh Lanta island group, including the southern tip of Koh Lanta Yai. Perhaps the most beautiful island is Koh Rok Nai, with its cliff-backed crescent bay, gorgeous beach and great reef diving.
There are limestone caves to explore at Koh Talabeng, a popular destination for sea-kayaking tours.
The Mu Koh Lanta Marine National Park surrounds the island of Koh Lanta Yai in the southern tip of Krabi province.
Ferries run from Krabi to Ban Sala Dan on the northern tip of Koh Lanta Yai, taking around 1.5 hours. Marine park excursions leave from Ban Sala Dan.