Time Out says
On the hills behind Barcelona, the heavily forested Serra de Collserola Natural Park is easily accessible by public transport. Kids will appreciate the freedom to run on tracks and paths through a natural environment – plus there are stunning views over the city. See website for maps and information about facilities.
Ctra Església, 92
|Transport:||Baixador de Vallvidrera (FGC)|
|Opening hours:||Mon-Sun 9:30am-3pm|