Is Montseny & Turó de l'Home worth it?

Don't drive in Barcelona for sightseeing: the metro, buses and walking reach every central sight, street parking is short-stay and expensive, and the whole city is a low-emission zone that foreign cars must pre-register for. A car only makes sense for day trips such as Montserrat or Sitges, and even those are easy by train.

• ZBE Rondes de Barcelona (low-emission zone). The whole city of Barcelona (plus L'Hospitalet, Sant Adrià and parts of Esplugues and Cornellà, ~95 km²) is a low-emission zone, Monday to Friday 7:00–20:00 except public holidays. Cars without a Spanish DGT environmental label (roughly petrol cars built before 2000 and diesels before 2006) may not enter; the ring roads (Rondes) themselves are exempt. Foreign-registered vehicles, including EU ones, must be registered in the AMB ZBE register before driving in (about €7, allow up to 15 days); an EU country's own sticker does not count. Camera-enforced fines are up to €200 (halved to €100 if paid within 20 days); non-compliant vehicles can buy a limited number of day passes. Rental cars from Spanish agencies already carry a label. zbe.barcelona
• ZBE registration for foreign vehicles. Register your foreign-plated car online with the AMB at least 2–3 weeks before your trip; without it you can be fined even if your car is modern. zberegistre.ambmobilitat.cat
• AREA street parking: Àrea Blava (blue) and Àrea Verda (green). Most central street spaces are paid AREA spaces run by BSM. Blue (Àrea Blava) is open to everyone, usually Mon–Fri 9:00–20:00 (Saturday too in the centre, Sundays/holidays at beach zones), with a 1–2 hour maximum shown on the signs; the price depends on your DGT label, about €2.50–3.75/h for an ordinary car. Green (Àrea Verda) is mainly for residents: non-residents pay more (about €2.75–4.25/h) and are usually limited to 1–2 hours, and some green bays are residents-only. Pay with the official smou app or at the meters; you cannot extend past the maximum stay. Overstaying risks a fine or the tow truck (grua). areaverda.cat
• Underground garages. Away from the AREA bays, the realistic option is an underground public garage (BSM municipal, Saba, Interparking, Indigo and others). Expect city-centre rates of several euros per hour and €30+ for 24 hours unless pre-booked; most Old City streets (Gothic Quarter, El Born, Raval) are pedestrianised or residents-only. bsmsa.cat