Trek the volcanic island of Nea Kameni, walk prior steaming vents, be told geology out of your instruction manual
https://dalantstudios.com/private-tours-santorini-the-guide-to-seeing-the-island-your-way/
Trek the volcanic island of Nea Kameni, stroll earlier steaming vents, read geology from your e-book, and soak in neighborhood sulfur hot springs.