Emerald Cave (Koh Mook)
Tham Morakot is a sea tunnel on the west side of Koh Mook that leads to a hidden beach and lagoon enclosed by limestone cliffs. Visitors swim or paddle through the roughly 80–100 m passage, which is only passable at suitable tides. It is a snorkel and swim attraction rather than a scuba site – no operator publishes dive depths or a dive plan for it.
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