U.S. News Insider Tip: Wander 20 minutes north to reach Hospital de Sant Pau. This elaborate, UNESCO-listed former hospital was the brainchild of architect Lluis Domènech i Montaner and is a ...

Erin Evans, Managing Editor This wide, tree-lined boulevard is one of the city's major tourist hubs – so much so that if you're visiting Barcelona, you're bound to end up here eventually.