Trek the volcanic island of Nea Kameni, walk previous steaming vents, read geology from your consultant
https://bloggertips.gr/santorini-guided-tours-how-to-choose-the-right-experience-for-your-trip/
Trek the volcanic island of Nea Kameni, walk earlier steaming vents, be trained geology out of your e book, and soak in within reach sulfur hot springs.