Dive· Koh Ha Yai· Thailand
Koh Haa Cathedral
7° 25.9′ N · 98° 53.8′ E · approximate
Two big interconnected caverns on Koh Haa Yai where divers can surface inside, Lanta's signature cavern dive.
Practical
Wikivoyage's Diving in Thailand: Cathedral is a set of interconnected caverns and swim-throughs on Ko Haa Yai, entrance at about 12 m and a swim-through at about 9 m, with an air space to surface inside. Lanta Diver calls Koh Haa its most popular dive and snorkel destination, with whale sharks sometimes seen. Koh Haa is about 25 km west of Lanta (1.5 hours by slow boat from Saladan). Use the park moorings at Koh Ha Yai. Park fee about 200 THB per foreigner per Wikivoyage (date not stated, verify locally). Position approximate: off the north side of Koh Ha Yai near the Southeast Asia Pilot moorings waypoint; the cavern entrance is not published.
Best for
Cavern diving for confident divers
Season
Mid-Oct to mid-May