top of the volcano crater during a tour of the island of nea kameni

cyclades greece minoan civilization eruption thirassia island active volcano boat trip boats anchor moored caldera circular archipelago clear sky eagean excursion ferry guided hike hot springs jaunt lava sands mainmast nea kameni ramble sailing ship santorini starting point sulfurous summer thera thira touristic attraction volcanic ash top crater during tour after long island dig hole few centimeters realize that