Nea Kameni
To peer into a live, sometimes smoldering volcano, join one of the popular excursions to Nea Kameni, the larger of the two Burnt Isles. After disembarking, there's a 130-meter (430-foot) hike to the top and a walk around the edge of the crater, and wondering if the volcano is ready for its fifth eruption during the last 100 years—after all, the last was in 1956. Some tours continue on to the island of Thirasia, often described as how Santorini was 50 years ago.