Barcelona's oldest residential district is a maze of narrow streets housing 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 most nights. Alongside Gothic buildings like the imposing Cathedral of Barcelona, 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. This spirited neighborhood, known locally as Barri Gòtic, is one of the city's most atmospheric and enchanting explorations serving up style in spades.