Trek the volcanic island of Nea Kameni, walk previous steaming vents, study geology out of your instruction manual
https://alexischma735.nexorafield.com/posts/santorini-guided-tours-what-to-expect-and-top-routes-to-book-2
Trek the volcanic island of Nea Kameni, walk prior steaming vents, learn geology from your help, and soak in neighborhood sulfur warm springs.