Bunkers del Carmel

• Take bus 119 to its last stop at Marià Labèrnia for the shortest walk up; lines 22 and 24 drop you further down a steep hill
• No shade or fences at the top, so bring a hat and sun protection and keep little ones away from the edges
• Late afternoon is best for cooler air and the strongest light over the city

Concrete platforms on the 262-meter Turó de la Rovira, the remains of a 1937 anti-aircraft battery now run as a heritage site by the city history museum. They give a rare 360-degree view over the Sagrada Família, the port, the beaches and Tibidabo. Kids scramble on the low ruins, and bus 119 climbs almost to the top.