Visit Santorini, Greece with the Amateur Traveler: This is the 3rd of 3 videos on the island and it shows video from a boat tour to the volcano in the center Santorini. The crescent shaped island is the caldera of a volcano and all that remains of an eruption 3600 years ago that probably caused the downfall of the Minoan civilization when a tidal wave from sunk the Minoan fleet and left them vulnerable to invasion.