In Barcelona the underground metro, or subway, is the fastest, cheapest, and easiest way to get around. Metro lines run Monday through Thursday and Sunday 5 am to midnight, Friday to 2 am Saturday and holiday evenings all night. The FGC trains run 5 am to just after midnight on weekdays and to 1:52 on weekends and the eves of holidays. Sunday trains run on weekday schedules.
When switching from a metro line to the FGC (or vice versa), merely insert the card through the slot and the turnstile will open without charging you for a second ride provided less than an hour and 15 minutes has elapsed since you punched in initially. Note that in many stations, you need to validate your ticket at both ends of your journey. Maps showing bus and metro routes are available free from the Tourist Information office in Plaça de Catalunya.
Transports Metropolitans de Barcelona. 93/214--8000; 93/298--7000; www.tmb.cat/en/home.