Trek the volcanic island of Nea Kameni, stroll past steaming vents, be told geology from your book
https://holdenuquz121.zenbloomer.com/posts/santorini-tours-with-hotel-pickup-convenience-from-door-to-door
Trek the volcanic island of Nea Kameni, stroll earlier steaming vents, examine geology from your instruction, and soak in nearby sulfur hot springs.