Trek the volcanic island of Nea Kameni, stroll earlier steaming vents, be taught geology out of your guide
https://picantiko.gr/santorini-transfers-the-smartest-ways-to-get-around-the-island-stress/
Trek the volcanic island of Nea Kameni, walk prior steaming vents, be taught geology out of your guide, and soak in regional sulfur hot springs.