Atlantis is believed to be a lost city that was extremely advanced for its time. Plato described this city in one of his writings, and wrote of it being destroyed in one day. People have been attempting to find this city for decades. The writings of Plato are the only written “evidence” of this city. This makes me wonder if perhaps Plato was doing some creative writing – maybe he was writing about his idea of a perfect city? Regardless of the lack of written evidence, people are determined to discover this city of wonders.
Lately, research pertaining to Atlantis has pointed towards the mud flats of Spain. It is believed that Atlantis could have been destroyed either by a volcano or a tsunami, and this portion of Spain has a history of tsunamis. Plato described the city as having rings of alternating land and water, and evidence suggests that this location has that same make-up (http://www.britannica.com/blogs/2012/05/atlantis-the-lost-city-beneath-a-swamp/). Researchers examined this site through many techniques, including satellite imaging, ground-penetrating radar, electrical resistivity tomography, magnetometers and spectrometers to find evidence that this is the site of Atlantis (http://www.popsci.com/science/article/2011-03/scientists-say-theyve-found-lost-city-atlantis-swept-away-tsunami). Evidence of memorial sites and a canal system were uncovered by archaeologists.
Another possible location for the Lost City is off of the coast of Cuba. Andrew Collins, a historian, has found underwater structures similar to those found in Egypt, such as pyramids and sphinxes (www.andrewcollins.com/page/articles/atlantiscuba.htm). A robotic video camera was sent underwater to uncover video of these gigantic structures. The theory of this Atlantis’ demise is that a comet exploded and rained down on this city, destroying it.
Both of these theories of Atlantis have archaeological evidence of human habitation, but that does not necessarily make them Atlantis. There is no direct evidence that can connect them to the Lost City, due to Plato having the only account of this city. Personally, I think it is most likely that Atlantis was not a real city, because of the lack of evidence and accounts of it.