The Twin Tunnels dive site is on a seamount that rises from the seabed at a few hundred metres to top out on a reasonably sized, 16m plateau. It is about 1 km south east of Tulagi Island in the Solomons. It has a pair of tunnels that drop vertically another 16 m from the top of the plateau into a horizontal cave at about 34m. The cave is no more than 10m deep and opens onto the wall. The dive proceeds up the wall and towards whichever edge of the seamount is facing the current, as this is where