Koh Muk, also known as Koh Mook, is a small island located in the Andaman Sea in southern Thailand. It is part of the Trang Province and is known for its stunning beaches, clear waters, and lush greenery. The island is popular among tourists for its relaxed atmosphere and natural beauty, making it an ideal destination for those seeking a peaceful getaway. One of the main attractions on Koh Muk is the famous Emerald Cave, a hidden lagoon accessible by swimming through a dark cave. Visitors can explore the cave and enjoy the unique experience of swimming in its emerald waters. The island also offers opportunities for snorkeling, diving, and hiking, allowing visitors to appreciate its diverse marine life and scenic landscapes.