Trek the volcanic island of Nea Kameni, stroll past steaming vents, be told geology from your information

https://guide-varna.com/xenagisi-sti-santorini-me-ntopio-odigo-o-pio-exypnos-tropos-na-deite/

Trek the volcanic island of Nea Kameni, walk prior steaming vents, study geology from your instruction manual, and soak in nearby sulfur warm springs.