During the past five days I've read two novels about scientists discovering Atlantis; one book sited it at the bottom of the Black Sea and the other placed it beneath the Antarctic icecap.

Here's a list of all the other possible locations for Atlantis that I know about:

Thera/Santorini in the Aegean Sea
The Azores in the Atlantic Ocean
England generally
The Isle of Avolon in Somerset
Rockall
Bimini in the Bahamas
Lake Titicaca, Bolivia