Eixample
Busy, central Eixample is packed with streets of stylish boutiques, bars, and restaurants around iconic square Plaça de Catalunya, while vendors sell their antiques under a mirrored roof at Mercat Els Encants flea market. Master architect Antoni Gaudí designed the towering art nouveau basilica Sagrada Familía, and rippled-stone mansion Casa Milà, which now hosts art exhibits and rooftop jazz concerts.