Trek the volcanic island of Nea Kameni, stroll past steaming vents, examine geology out of your guideline
https://kalikantzaros.gr/santorini-impressive-tours-review-a-comprehensive-look-at-private-island-excursions/
Trek the volcanic island of Nea Kameni, walk beyond steaming vents, research geology from your manual, and soak in regional sulfur warm springs.