Mu Koh Samet National Park, or Khao Laem Ya Park, is a Thai marine park off Rayong’s coastline. Spanning 131 square kilometres in the Gulf of Thailand, the park comprises an archipelago and smaller islets, ideal for boating, island tours, and water sports like snorkelling. These include Koh Samet, Chan, Talu, Kudi, Kham, and Plai Teen islands, ancient nestling rainforests, waterfalls, alluring reefs, sandy beaches and wildlife reserves.