Even on a tight schedule, Ancient Thera earns the hours.
Allow 1.5–2.5 hours incl. access.
A sprawling open-air site combining real archaeology with one of the best panoramas on the island, reached by a switchbacking road or a steep hot hike up from the beach. The ruins are evocative but require imagination, and the climb in summer heat is no joke. Rewarding for those who like history with a view and don't mind the effort.