Barcelona is easy to navigate. The modern Eixample district is built on a grid, while the old town (from Placa de Catalunya to the port) is a labyrinth of narrow streets best explored on foot.
Metro. The metro is fast, clean and covers most of the city. A T-Casual card gives you 10 trips for around 11 euros, valid on metro, bus and tram. Lines run from about 5am to midnight, and all night on Fridays and Saturdays.
Bus. An extensive bus network fills the gaps the metro misses. The Bus Turistic hop-on-hop-off service covers the main sights if you want an overview.
On foot. Walking is the best way to experience Barcelona's neighbourhoods. The old town, Born and Barceloneta are all walkable, and strolling the Passeig de Gracia and the seafront promenade is half the point of being here.
Taxi. Black and yellow taxis are plentiful and reasonably priced. A ride across the centre costs around 10 euros.
Cable car. The Teleferic de Montjuic runs from the harbour to Montjuic hill. The Tramvia Blau (Blue Tram) and funicular take you up Tibidabo.