Ko Muk

Ko Muk is a small island in the Andaman Sea off the coast of Trang Province in southern Thailand, administratively part of Ko Libong Subdistrict in Kantang District. Located within Hat Chao Mai National Park, it is best known for Tham Morakot (Emerald Cave), a sea cave with a hidden white-sand beach accessible only at low tide. The island features sandy beaches, limestone cliffs, traditional fishing villages and low-key resorts.

Visitors can expect a quiet, low-development island with sandy beaches on the west coast such as Charlie Beach and Sivalai Beach, limestone cliffs, coconut groves and small Muslim fishing villages. The main attraction is Tham Morakot on the west side, reached by swimming or kayaking through an 80-meter dark sea tunnel to an enclosed beach and lagoon. Exploration is by walking, cycling or longtail boat, with snorkeling and kayaking in clear waters around the island.

Ko Muk is a traditional fishing island within Hat Chao Mai National Park, established in 1981 to protect the Trang coastline and islands. The island has long been inhabited by Muslim fishing communities and became known nationally after Tham Morakot was promoted as a key natural attraction of Trang.

The island is home to a traditional southern Thai Muslim fishing community with small villages, mosques and fishing piers. Local livelihoods center on fishing, rubber and small-scale tourism, reflecting the coastal culture of Trang Province.