Trek the volcanic island of Nea Kameni, stroll past steaming vents, be told geology from your e-book
https://laacousticmusicfestival.com/santorini-impressive-tours-review-are-these-private-tours-worth-it/
Trek the volcanic island of Nea Kameni, walk prior steaming vents, analyze geology from your e-book, and soak in nearby sulfur warm springs.