More than 3,600 years ago, the largest volcanic eruption in history occurred in Santorini. As you make your way around the Greek city on our Santorini tours, youíll get to see the impressive caldera that the eruption left behind. Donít worry: there hasnít any recent volcanic activity. You can also visit the local hot springs and take a quick detour to Thirassia Island for some fun exploration. For more things to do in Santorini, we suggest you check out the Santorini tours list below.