Trek the volcanic island of Nea Kameni, walk past steaming vents, study geology from your e book

https://andersonagel343.talesignal.com/posts/santorini-guided-tours-what-to-expect-and-top-routes-to-book-2

Trek the volcanic island of Nea Kameni, walk earlier steaming vents, read geology from your book, and soak in neighborhood sulfur hot springs.