Dive along beautiful walls rising up from the deep. Huge gorgonians and large soft coral species are to be seen here and, of course, lots of sharks too! Bougainville Reef evolved from a volcano that rises up from several thousand meters almost to the surface. It offers some fantastic labyrinths with caves, tunnels, canyons, overhangs and some spectacular drop offs. Trips to Bougainville Reef are rare and very weather dependent. Most of the anchorage sites are not very well sheltered, so it is unprotected and it can be quite rough out here.