The metro can take you to many places. Stations are marked on most maps; every station has a detailed scheme of exits to the city. 1- to 5-day public transport tickets are available which allow unlimited travel on the metro and bus networks.
A one-journey ticket cost €2.40, so it's probably best to buy a multi-person 10-ride ticket for €11.35 (called a T-10) or a personal monthly ticket for €20.
These tickets are also valid on the buses and trams. 1- to 5-day public transport tickets are available which allow unlimited travel on the metro and bus networks.
T-casual card. Individual travel card allowing 10 journeys to be made on all operators in the Integrated Fare System. Ticket available with T-mobilitat. 1 zone / From €11.35
T-usual card. A holder-specific travel card allowing unlimited journeys to be made for one month on all operators in the Integrated Fare System. Ticket available with T-mobilitat. 1 zone / From €20
Single ticket. Do you use public transport very rarely? This is the ticket for you.. From €2.40
Airport ticket. A single metro journey between the airport and the rest of the metro network. 1 zone / From €5.15
T-grup card. A multi-person travel card allowing 70 journeys to be made over 30 days on all operators in the Integrated Fare System. Ticket available with T-mobilitat. 1 zone / From €79.45
Be sure to look after them well as bent or damaged cards will not be read by the ticket machines (such cards can be replaced at one of TMB's customer service centers). Metro operating hours are: Sunday and Mon-Thur 5:00 to 24:00, Fri 5:00 to 2:00, Saturday 24 hr (continuous service from Saturday at 5:00 untill Sunday at 24:00).
Pay attention to the fact that to get from metro lines operated by TMB (1,2,3,4,5 and 11) to the ones operated by FGC (6,7 and 8) you need to exit and then enter through a new pay-gate. In this case, if you had a one-journey ticket, you need to get a new one. If you used a multiple journey ticket (such as the popular 10 rides T-10 ticket -the one that locals use the most-) you won't be charged for a second time when changing lines.
Unusual features are: all cars are air conditioned; there are large screens for video advertising between lanes (e.g. at Universitat).
Plan your journey by consulting the updated map of the entire Barcelona metro network and the plan of each of the lines.