Barcelona

Barcelona is that rare city where you can spend the morning at the beach and the afternoon inside a Gothic cathedral. Antoni Gaudí's fantastical architecture gives the place its signature look, from the still-unfinished Sagrada Família to the mosaic-tiled terraces of Park Güell, and his influence turns up on ordinary streets throughout the city.

The medieval Gothic Quarter is a maze of narrow lanes, hidden squares, and tucked-away tapas bars, while the wide avenues of the Eixample show off elegant Modernista facades. Down by the water, the Barceloneta district trades grandeur for sand, seafood, and a laid-back seaside energy. Catalan food culture runs deep, so make time for a long, grazing meal of small plates and local vermouth.

The Mediterranean climate keeps things pleasant for much of the year, with late spring and early fall hitting the sweet spot. The city draws big summer crowds, and busy areas like Las Ramblas are known for pickpockets, so keep an eye on your belongings.