As a child, the lost city of Atlantis fascinated me. How could an entire empire just vanish in the blink of an eye without a trace? Before coming to Santorini my teacher sent out an article on Facebook about the possibility of Atlantis be in Santorini. After reading and talking to Lisa it was clear that there is real geological evidence for Atlantis being in Santorini. Plato states in Critias and Timaeus
”…there occurred violent earthquakes and floods; and in a single day and night of misfortune all your warlike men in a body sank into the earth, and the island of Atlantis in like manner disappeared in the depths of the sea …the sea in those parts is impassable and impenetrable, because there is a shoal of mud.” 
“in like manner disappeared into the sea” 
When the Minoan eruption occurred in 1613 BC + 13 years (cite Friedrich et al. 2006), it would have had many earthquakes and landslides in the caldera as it collapsed.
“violent earthquakes and floods” 
Minoan ash on Crete and Turkey, suggests the caldera collapse that produced a tsunami during the eruption.
“shoal of mud” 
There would have also been pumice fall from Phase 1 of the eruption floating in the ocean creating pumice rafts that would have been impassible. Plato also states
“…and he made circular belts of sea and land enclosing one another alternately. Some greater, some smaller, two being of land and three of sea, which he carved as it were out of the midst of the island.” 
A Nested caldera is a geological process where there is multiple caldera collapses over time creating a bullseye shaped island. Santorini has experienced 4-caldera explosions over time, the one before the Minoan eruption being 21 thousand years ago. The centerpiece of the bullseye is a new volcano in geological timing that we know erupted in ancient times.[Fig.1]
“…the stone they quarried beneath the central island all round, and from beneath the outer and inner circles, some of it being white, some black and some red.” 
When Plato talks about Atlantis he talks about red, white and black rocks as well as cool and warm springs. At Cape Movropetra on Santorini I found many different kinds of rocks that were ejected from the vent of the volcano during phase 4 of the eruption ( For more information on Phase 4 see The Grand Finally by: Gracie Timmerman) a few being gray and block andesite, red scoria, black obsidian and white limestone.[Fig.2] Each beach we have been to have been a different color resulting from the wide variety of volcanic rocks found here. There are also may hot springs in Santorini next week our group will be swimming in two just on the coast of Nea Kameni.[Fig.3]
The final line of evidence, and the one I think is most convincing, is where Plato states “in a single day and night of misfortune all your warlike men in a body sank into the earth, and the island of Atlantis in like manner disappeared in the depths of the sea”  he means it quite literally. Geologists have postulated that the Minoan eruption and all its phases happened likely occurred within 24 hours.. Many people try to diminish the reality of Atlantis to mere legend even though Plato states repeatedly that the story is not invented but based on fact. The Atlantis Plato describes bears a high resemblance to the pre-Minoan Santorini. All the description he says about the disappearance of Atlantis sounds like the different phases of the Minoan eruption the earthquakes and floods would have accompanied the final stages of the Minoan eruption; and the rocks that can be found all over the island match the ones Plato describes. The islands shape itself matches Plato’s description. Atlantis even disappeared in the same amount of time as the Minoan eruption Friedrich, Walter L. Santorini. Denmark: Aarhus University Press, 2009. Print