Located 45 kilometres north of Koh Samui, it is mid way between Koh Phangan and Koh Tao and provides large schools of pelagic's, steep walls, rugged rock formations and an awesome 'vertical chimney' swim through.

The swim through, located on the northwest side starts from 18m down and exits at 6m where the natural light penetrating the top makes it fantastically picturesque.

At 18m, two divers can enter the cavern abreast where it bends vertically upwards. At 12m you'll spot a hole that opens up and it is possible to swim back into open water from here. At the exit, just 6m from the surface, you'll find yourself surrounded by a magnificent carpet of pink anemones full of vibrant anemone fish.