This an interesting site questioning the various Atlantis theories. It also has really good picture diagrams to support the questioning.
What do you people think ?
"In 1999 Discovery Channel broadcast a three-part series called Quest for the lost Civilisation. In it Graham Hancock stated that the pyramids, Angkor Vat, Stonehenge, the stones of Carnac, the Nazca lines, temples in Mexico and the statues of Easter Island were all part of an ancient global civilisation of seafarers who were apparently obsessed by astrology. The temples of Angkor Vat (in Cambodia) were said to be built in the shape of the zodiac sign Draco, the pyramids of Gizeh in the shape of Sirius; the Sphinx is supposed to be looking at the sign of Leo. It's all rather vague. Hard to say whether it's nonsense or not. More information can be found in Hancocks books, like Fingerprints of the Gods (Heinemann) and Heaven's Mirror (Penguin Books).
Not long after this, the BBC hit back with two episodes of Horizon, in which Atlantis believers were even compared with Nazis! Part 2 was focussed on Hancocks ideas, at least on some of them. The corrosion of the sphinx was said to be caused by salt. The placing of the pyramids was determined by the building site and not by the stars, according to Kate Spence. That the temples of Angkor Vat were built in the shape of the zodiac sign Draco is also untrue, according to E. Mannikka; also there are more than 60 temples and Hancock chose only 10 out of them. Indeed it is not a convincing theory at all"