The Old Testament is a historical document. I believe that we are the descendants of the culture(s) that existed then, (No I'm not on the Zitchin alien bandwagon). There's a good deal of circumstantial evidence to support this. Only time, and the honesty of the scientific community will tell.
There have also been some interesting discoveries off the west coast of Cuba. Apparently there are what appear to be "obvious" ruins under 2000+ feet of water. 2000 feet of water cannot be accounted for by glacial melting. We're talking catastrophic change. I can't vouch for the validity of the story, but the company that made the discovery was - I believe - testing out new equipment when they made the discovery. They don't appear to have an agenda. Atlantis may have been real after all...
They wre hired by the Cuban government to search for sunken Spanish treasure ships when they made this discovery.
2000 feet of water cannot be accounted for by glacial melting. "
I have an idea about the 2200 ft depth. I think that the Gulf Of Mexico was blocked off from the world's oceans during the Ice Age and dried out to a lower but stable level. The structures that are now 2200 ft below the surface were in fact built on dry land that was, at that time, the coast of the (reduced water level) Gulf.
Now, as the Ice Age ended, the melting water rose and breached the 'dam' that isolated the Gulf submerging the recently found structures. I think 2200 ft is to great to have subsided.
I also believe that what-ever happened to Atlantis is related to the end of the Ice Age. In my opinion, Atlantis is very old, maybe 15,000 years old or older.
The National Geographic Society had pledged $2 million to the exploration company to investigate these structures but were pressured by the US State department to withdraw because they were affiliated with the communist Cuban government. So... (don't know when we'll know something?)