Atlantis could be in a few locations, bahamas, indo-china, Med. sea, etc.

If the guy that said 'sunamy' meant the one in Med. sea, there was an actual island of Minoa that was destroyed when a neighboring island had a massive volcano eruption that sent huge waves and ash and destroyed Minoa, which was recently discovered and thought to be the fabled Atlantis.

There's a bunch of man-made structures similiar to ancient bronze-age architecture underwater near the Bahamas, that's also another spot where it could be.

Another theory is that it's under Antarctica, that it's so old, after it was destroyed by its self, the continental drift took it under antarctica.