Trek the volcanic island of Nea Kameni, stroll beyond steaming vents, be informed geology out of your handbook
https://emagazine.gr/9-vimata-na-epilexete-nisi-gia-diakopes/
Trek the volcanic island of Nea Kameni, walk past steaming vents, study geology from your e-book, and soak in local sulfur sizzling springs.