Trek the volcanic island of Nea Kameni, stroll past steaming vents, be told geology out of your advisor
https://alexischma735.nexorafield.com/posts/santorini-daily-tour-options-from-caldera-cruises-to-winery-visits-2
Trek the volcanic island of Nea Kameni, walk previous steaming vents, read geology from your instruction, and soak in nearby sulfur warm springs.