Oia, Santorini

A village of white houses and blue-domed churches clinging to the rim of Santorini's caldera, a flooded volcanic crater, with famous sunsets over the sea. Walk the cliff-top path from Fira to Oia, about 10 km and 3 to 4 hours, for spectacular views.

Oia is extremely crowded at sunset, especially when cruise ships are in; find a spot early, or watch from Imerovigli instead. Also visit the excavated Bronze Age town of Akrotiri, buried by an eruption around 1600 BC, and the red and black beaches.