This must be one of the most atmospheric sites in Palau. It centres on a large tunnel deeply undercutting a sheer wall at about 25m. The vast chamber is heavily coated with photogenic coral formations and gorgonians, and it's not unusual to spot rays and whitetip sharks resting on the sandy floor. Divers exit through a wreath of large gorgonians growing from the top and sides of the window, and continue their dive along the wall.

The entrance to the tunnel is wide and high, as is the interior, making it suitable for all levels of divers. Schools of jacks, snappers and bumphead parrotfish are also regularly sighted.