Picture this. You’re on a boat. You dive off into the cool Mediterranean ocean. You swim about twenty meters and suddenly, the water changes color and temperature and you’ve just swum into hot springs. This is just another one of those unique things you must do on your stay in Santorini (just don’t wear your best swimsuit in the hot springs).
Every day, boat tours in traditional wooden yachts leave from the Old Fira port which will take you to the hot springs and also to the volcanic island of Nea Kameni, where you get the opportunity to hike around the rim of an active volcano.