Barcelona Gothic Neighborhood, Barcelona

Barcelona's oldest residential district is a maze of narrow streets that house some fantastic examples of Gothic architecture. Lots of trendy young designers have opened up outlets here over the last few years, along with some classy—but not too flashy—restaurants, including tapas bars that fill up with the city's youth on most nights. Along with the Gothic buildings, you can see the most concentrated remains of the Roman period here, between Plaça de la Catedral and Plaça Sant Jaume . The old Roman walls still demarcate the boundary between this and its adjacent districts.