Take a boat to Nea Kameni (volcano) and Palea Kameni for volcanic landscapes, hiking to craters, and swimming in the thermal/hot spring waters.
Oia is world-famous for its sunset views. Get there early to snag a spot. Imerovigli is slightly quieter and also offers sweeping views of the caldera and sea.
This scenic trail (roughly 6 mi / 10 km) runs along the rim of the caldera, passing through Fira, Firostefani, Imerovigli, and Oia. You get sweeping views, photo ops, and a connection with nature.
An archaeological site preserved under volcanic ash (similar to Pompeii). It gives you a glimpse into the Minoan-era civilization of the island.
Santorini’s volcanic activity has given it some striking beaches: Red Beach (near Akrotiri), Black Sand Beaches (Perissa, Kamari), White Beach, etc. Great for relaxing, swimming, or photography.
Santorini is famous for its wines (especially white wines like Assyrtiko). Many wineries offer tours + tastings with views. Examples: Santo Wines, Venetsanos, Sigalas.
Villages like Megalochori, Pyrgos, Emporio have charm, quieter streets, local life, and scenic views.
Instead of (or in addition to) a boat cruise, you can kayak around the caldera, explore sea caves, paddle past colored beaches, get up close to rock formations & hidden coves.
Museums like the Archaeological Museum of Thera, churches, monasteries, and local history sites add cultural depth.