St. Mary's, Isles of Scilly, United Kingdom

The Isles of Scilly, an archipelago off the Cornish coast of southwest England, is defined by its heathland and fringed by sandy beaches. On Tresco, one of the five inhabited islands in the archipelago, Tresco Abbey Garden is home to subtropical plants and the Valhalla Museum, displaying a diverse collection of artifacts. As a small, privately owned island, Scilly’s ambiance of exclusivity extends to its upscale cafés and art gallery. The tower of 17th-century Cromwell’s Castle stands north of Tresco and is one of a handful of stone fortifications that survive from England’s Interregnum (“between reigns”) period of 1649-1660.