I dunno, but the man made structures they found off the coast of cuba under 2,000 feet of water is very intersting.
here is a link. there are many on it this is just the first one i found. I just wish national geographic or somebody with the big bucks comes in to finance the exploration of this site.
link
sample:
"WELL, AN INTERESTING POSSIBLE DISCOVERY IN THIS UNDERWATER MEGALITHIC SITE THAT'S UNDER RESEARCH IS THAT IN SOME OF THE SONAR DATA, NOT THE VIDEOTAPE, BUT THE SONAR DATA, THERE ARE SOME RETURNS THAT SUGGEST THAT THERE MIGHT BE METAL, LIKE METAL ON THE TOPS ON SOME OF THE OBJECTS. WOULD THE USE OF METAL AS SHEETING ON STRUCTURES BE SOMETHING THAT WOULD BE ASSOCIATED WITH THE RESEARCH ON ATLANTIS?
Well, now we are getting really close to the Atlantean realm. Plato tells us that at the height of their prosperity to show off their wealth, would actually sheet their outer walls of the city with great sheets of what he called 'orichalcum.' Orichalcum means nothing more than high grade copper which didn't exist in Europe in large numbers like North America. So, here were people who used a design technique, an architectural technique of including sheets of precious metal in their walls and now we are finding this supposedly at a site underwater off of Cuba. I would say now we are beginning to narrow in on a cultural commonality. "