La Ramblas ©
Arguably the most famous street in Europe, the wide tree-lined boulevard known as La Rambla (or Las Ramblas) is a long continuous pedestrian avenue that technically changes names five times as it cuts through Barcelona's Old Town, the Barri Gotic, from the Placa Catalunya to the city's port. It is lined with cafes, restaurants, and shops, usually thronged with leisurely walkers enjoying the sights and sounds. The sprawling marriage of nature and creative architecture and ornamentation that is Gaudi's Guell Park is a must. The pretty square of Placa Reial, enclosed by impressive buildings and promising some fantastic restaurants and nightclubs, is a popular social venue and sometimes hosts concerts and live performances.