I've seen that place being talked about on ? some show... I can't remember which one. It's cool as heck, but natural foramations. So someone said anyway.
it shows up on the dicovery channel once in a while "The Pyraminds of Japan"the debate is 50/50 if its man made or natural,something about right angles?the underwater camera guys(who work for the discovery channel) says its definitly man made.fascinating stuff,but when you see the rock formations that are above the water,it looks like a large portion of the cliffs simply sank