Refugi 307 - Museu d’Història de Barcelona

Refugi 307 is a Spanish Civil War-era bomb shelter tunneled into the Montjuïc hillside, visitable only by guided tour that recreates the experience of the bombing raids Barcelona endured. Booking is required rather than merely recommended, and reviewers consistently describe the roughly hour-long English-language tours as fascinating and well-guided, contributing to a 4.5-star rating and strong culture score. Its lower aesthetic score compared with other MUHBA sites reflects the raw, unadorned nature of the tunnels themselves rather than any shortcoming in the experience. It suits visitors with a genuine interest in Barcelona's wartime history and is best planned ahead rather than attempted as a walk-in.