The central part of the city is reasonably flat, but the city extends onto the surrounding hills.
The architect Antoni Gaudi lived and worked in Barcelona, leaving many famous buildings.
It has an airport to the southwest of the city named "El Prat de Llobregat".
Barcelona is known for its lively nightclubs and tapas bars. It also has a large aquarium near the sea. Another nearby tourist attraction is the mountain of Mont Serrat.