[Majorion]

Keep in mind that over the millenia the Earth has changed and shifted and continents separated. Even if Atlantis were one very specific large piece of terrain, over thousands of years it will become scattered around the globe. Logically you'd find pyramids and cities under water, and perhaps even find remnants on land in very far away places from each other. All this would extend, depending on how a long a period; geologically, to almost every place on Earth.