One of the first things to do when visiting Barcelona is to buy a T-10 integrated transport ticket. This ticket will give you access to all the city’s buses, metro trains, local trains, trams, night buses and funiculars (but not the cable-cars and privately run funicular to Tibidabo).
It’s a multi-person ticket which means up to 10 people can share the same ticket.
A single journey by bus, metro or tram is € 2.15 – a T-10 with 10 journeys is € 9.95 – bargain.
You can use the ticket as many times as you need within a one and a quarter hour period within Zone One and it counts as a single journey. Though be aware that once you leave the metro, when you re-enter it will count as a new journey.
In practice what this means is you can catch a barrio bus (small local bus) to connect with a regular bus, travel across the city, jump on a tram or train to a metro station and take the metro to your final destination, and it all counts as a single journey.
Some busses now have wi-fi.
Bus routes worth getting to know include:
24 – will take you from Passeig de Gràcia to Parc Güell (and the Bunkers) and back again.
55 – a simple way of getting to and from Montjuïc.