Visit the ruins at Ancient Thira
The chalky ruins of this 3,000-year-old-city are just above Perissa, at the summit of Mount Vouno. You’ve got an amphitheatre, an agora, and a sanctuary dedicated to Achilles, hero of the Trojan War. Rumour has it that many of the ancient artefacts on display in Athens’ museums were originally from here. Ruins aside, the bird’s-eye views of the Cyclades islands from here are epic.