Koh Whan are an incredibly scenic diving destination. The topography from the surface is absolutely stunning; monolithic limestone mountains rising vertically from the sea and soaring to heights of more than 500 meters. Underwater you'll find an amazing environment of rugged caves, overhangs and swim-throughs in the soft rock. Other dives include sheer walls that plunge from the surface to over 25 meters. These walls contain a profusion of soft corals, large orange-colored fans, black corals, and long stringy sea whips.

Koh Mook is a large island comparing with nearby islands but little smaller than Koh Libong. It is well known as the owner of Morakot Cave. Koh Muk is virtually more interesting for its beautiful beaches of fertile natural surroundings.

Outcrop off Koh Muk's northwest point, The rook itself is covered in masses of splendid purple and red soft corals, with holes and cracks providing hiding places for fish. You can head either south along the west coast or east along the north coast - both options offer overhangs, but the latter is the most interesting. More significant than the diving on offer, there's an interesting adventure for snorkellers
The emerald cave is a secret paradise hidden behind 250 meter soaring cliffs, nestled in the middle of Koh Mook. To gain access visitors must swim through a natural tunnel, once through a small sandy beach with lush vegetation and vine covered cliffs is the reward. This is an adventure you will never forget! And this is only one of many stops during the day, so prepare for an excursion beyond the ordinary.