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.
Facts
- Region: Thailand – Koh Lanta & Krabi
- Area: Trang islands
- Level: beginner
- Current: low
- Type: cave
- Coordinates: 7.369, 99.28 (approximate)
- Highlights: sea cave, hidden lagoon
- Unverified: Not an established scuba site: depths unknown; sources disagree on tunnel length (20 m, 80 m, 100 m).
- Tips: Go at mid tide; at low tide the cave can be dry and at high tide the entrance closes. Midday is crowded with tour boats.