Carretera de les Aigües

Carretera de les Aigües is Barcelona's beloved hillside walking path running along the Collserola hills. The Route: A mostly flat path running about 10km along the hillside. Stunning city views throughout. Dog Paradise: Very popular with dog walkers. Off-leash common on quieter sections. Access: Multiple entry points from Sarrià, Vallvidrera, and Tibidabo funicular.