Garraf Natural Park

• Start at La Pleta, the park information center in the Olivella valley, where staff can point you to the shortest, kid-friendly loops
• Little natural shade, since the limestone hills are rocky and sparsely wooded, so bring hats, sun cream, and plenty of water
• Easiest reached by car, with a roughly 45-minute drive from the city and no direct train into the park interior

A protected limestone massif south of the city, between Castelldefels and Sitges, crossed by marked GR and PR trails through scrubland and Mediterranean fan palms. Families can walk shorter circular routes from the La Pleta information center in the Olivella valley, spot caves and rocky gullies, and reach ridge viewpoints over the coast.