Trek the volcanic island of Nea Kameni, stroll earlier steaming vents, be told geology out of your consultant
https://athensup.gr/santorini-sightseeing-tour-guide-how-to-see-the-islands-highlights/
Trek the volcanic island of Nea Kameni, walk prior steaming vents, read geology from your book, and soak in nearby sulfur sizzling springs.