Plaça d'Espanya
This busy circle is a good place to avoid, but you'll probably need to cross it to get to the National Art Museum of Catalonia and other nearby Montjuïc attractions. It's dominated by the so-called Venetian Towers, built as the grand entrance to the 1929 International Exposition. They flank the lower end of the Avinguda Maria Cristina (the buildings on both sides are important venues for the trade fairs that regularly descend on Barcelona).
In the roundabout’s center is the Font Monumental (Monumental Fountain), which was created by Josep Maria Jujol, the Gaudí collaborator who designed the curvy and colorful benches in Park Güell, and features sculptures by Miquel Blay, one of the master craftsmen behind the Palau de la Música Catalana. The Font Màgica (Magic Fountain), a second water feature at the base of the Palau Nacional, usually hosts a nighttime lights-and-music spectacular---however, severe drought in Catalonia has paused most performances. Across the circle from the Towers, the neo-Mudejar former-bullring, Les Arenes, is now a shopping mall and viewpoint.