The Emerald Cave or Tham Morakot in Thai (Emerald Cave) is a cave only accessible by sea through a 80 meters long dark tunnel that you can cross by swimming or kayaking (depending on the height of the water) before arriving to a skylight with a small white sand beach and turquoise water. It is also an interesting spot for snorkeling.
A beautiful place a little hidden but that everybody knows and that attracts all tourists tour of local agencies. To really enjoy the Emerald Cave and have the cave for you alone, the best option is to stay in one of the hotels in Koh Mook and go in early morning before the arrival of groups from Koh Lanta, Trang...