Koh Haa Yai (Cathedral)

Koh Haa Yai is the largest of this group of islands. Often mistakenly called Koh Haa Five, many divers love to visit the three large caverns on the south west of Koh Haa Yai. Two of the caverns are inter-connecting via a large round swim-through and the largest is often referred to as The Cathedral.

Harlequin shrimps, leafy ghost pipefish, gorgonian sea fans, spiny lobsters in cracks and, if you are lucky, you may even spot a whale shark cruising past on the western side.