I don't remember the actual name of this place, but it is a shallow wall (40 feet or less) with some small caverns along it's length on the South-East coast of Oahu. The day before, the divers on the boat were visited by a humpback whale underwater at this spot. Today, we saw several whales in the distance on the surface, but none underwater. Visibility was about 80-100 feet. As is to be expected in Hawaii, we saw several turtles during the dive.