Santorini Volcano and Hot Springs Boat Trip

This boat trip takes you to two volcanic islets formed by Santorini's ongoing volcanic activity: Nea Kameni with its active crater and Palea Kameni with naturally heated sulfur springs. You'll hike 20 minutes across black volcanic rock to reach steaming vents where you can feel the earth's heat through your shoes, then swim in orange-tinted thermal waters that stay warm year-round. The boat ride itself offers unbeatable views of Santorini's caldera cliffs from sea level, something you can't get any other way.

The experience starts with a slightly chaotic boarding process at either Fira's old port (reached by cable car or donkey) or the larger Athinios port. Once on the volcanic islands, the terrain is genuinely otherworldly: sharp black rocks, sulfur smells, and patches of ground hot enough to steam. The hot springs aren't like a spa, they're murky orange seawater warmed by underwater volcanic vents, and you'll need to swim about 30 meters from the boat to reach the warmest spots.

Most tours cost between 15-25 EUR and feel rushed, giving you just 30 minutes on each island. The volcano hike is worth it if you've never seen active volcanic terrain, but skip this if you're expecting dramatic lava flows or crystal-clear hot springs. Go in the morning when it's cooler for hiking, and honestly, the boat ride and caldera views are often more impressive than the destinations themselves.