Passeig de Gràcia
This is the main street in Barcelona for shopping. It stretches for a mile and is full of (expensive) shops and restaurants; it’s also where almost all the big modernist buildings are (among the most beautiful and famous: La Casa Fuster, la Casa Ametller and La Pedrera). Don’t make the mistake of eating here, except for very late at night: prices are jacked up for tourists and the food is usually not the best.