Barcelona Metro L6 is the city's oldest railway line and was opened as the Tren de Sarrià in 1863, although it has only been part of the underground system since 1929.
It runs from the the Plaça Catalunya to the uptown suburb of Reina Elisenda and is operated by Ferrocarrils de la Generalitat de Catalunya (FGC).
Given this is just a short line all the stops are important as they take you from the city centre to the Zona Alta of Sarrià-Sant Gervasi, traditionally the richest and most select part of Barcelona along with Pedralbes.
You can buy single journey tickets and a variety of travel cards, including the excellent value T10, in the machines in the FGC entrances.
However, if you are visiting for a few days, it is well-worth investing in a Barcelona Card, which not only gives you full access to the Barcelona integrated transport system, including metro, buses, trams, ferrocarrils but also discounts on Barcelona museums and tourist sights as well as in some shops and restaurants.
Number of Stations: 9
Length: 7 km
Time of Journey: 14 minutes