City buses run daily from 5:30am to 11:30pm and the route maps are displayed at the bus-stops. They do not drive very carefully, like the rest of the traffic in Barcelona, so beware. The ones with a red band always have a stop at a central square and blue bands indicate night buses. The single ticket costs 1,10€, so it's better to take a 10-ticket card for 6,00€.

If you will stay just a couple of days and want to use it a lot a unipersonal ticket for 2 days costs 8,40€ and the 3 days card 11,80€ To see the best known sights in the city, take the Barcelona Bus Touristic which operates from 28 March to 6 January, 9am-7.45pm. The bus runs every 20 to 30 minutes and the whole journey takes up to 2 hours. A one day ticket (purchase it on the bus) costs 15.00€, a two days' ticket costs 19.00€