Isles of Scilly, UK
This dreamy archipelago sits just off the Cornish coast. Head to car-free Tresco for romantic strolls along the sandy beaches and heathland and fairy-tale 17th-century castle ruins.
Where to stay: Cute one-bedroom cottages are dotted throughout verdant gardens at Tresco Sea Garden Cottages. Views stretch across the sea and the lighthouse, so there's little reason not to stay in bed all day…