Santorini

Santorini's iconic blue-domed churches and white-washed cliffside villages, perched on a caldera formed by a volcanic eruption around 1600 BC (one of history's largest, possibly inspiring Atlantis), attract 2 million visitors annually. While its tourist numbers are a quarter of #5 Prague's 8 million, the island's dramatic sunset views over the Aegean Sea are unmatched. The unique volcanic soil yields 1.5 million liters of Assyrtiko wine each year, a specialty you won't find elsewhere. For sheer natural beauty and romantic ambiance, Santorini remains a top contender despite its smaller scale.