There's a funicular (€1.50 one way, €2.30 return) and cable car (€2.90 one way, €3.80 return) of use when going to Montjuïc, and there's also a tram (€1.70 one way, €2.40 return) and funicular service (€1.80 one way, €3 return) to Tibidabo - full details are given in those sections of the text. On these services, your targeta (the T1) is only valid for the Tibidabo tram. Finally, the cross-harbour cable car (€6 one way, €7.20 return; €3.70 if get on or off at the halfway station) is well worth taking at least once for the views.