Although it's mainly a residential area, Vallvidrera is worth visiting on your way to the Tibidabo hill. This neighborhood offers some great views of the city - when the weather is good, you can even see Mallorca and the Pyrenees!
You can get here by the Vallvidrera Funicular which runs from Peu del Funicular station on the Barcelona–Vallès Line.
Wikipedia https://en.wikipedia.org/wiki/Vallvidrera
Coordinates 41°24'54.243" N 2°6'26.936" E
