guided tour of nea kameni, the volcano island in santorini (greece

cyclades greece minoan civilization eruption thirassia island active crater 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 volcainc islands volcanic ash tour are sunny day