Trek the volcanic island of Nea Kameni, walk prior steaming vents, research geology from your handbook

https://www.scribd.com/document/1037270800/Private-Santorini-Tours-Luxury-Itineraries-Sunset-Moments-and-Hotel-Pickup-Made-Easy-133618

Trek the volcanic island of Nea Kameni, walk past steaming vents, be taught geology from your manual, and soak in within sight sulfur hot springs.