The countdown is over: today registrations open for 48h Open House Barcelona 2025, the festival that every year invites you to discover the city from the inside. During the weekend of October 25 and 26, 199 buildings, studios and spaces normally closed to the public will open their doors so that anyone can explore them… for free and with no other requirement than curiosity.
Mind you: some of the most coveted places on the program require prior reservation (and a small payment of 3 euros). And if we have learned from previous years is that places fly, so better have the web open and your finger ready before the clock strikes eight.
When and how to register

Registration opens this Monday, October 20, at 8:00 pm.
Registrations can be made exclusively through the 48h Open House Barcelona website. You only have to select the building or itinerary with reservation, enter your data and confirm your registration. In minutes you will have your ticket to access some of the most emblematic spaces of the city.
Do I have to pay?
Almost all visits are free, but visits with previous reservation have a cost of 3€.
Which buildings need to be booked at 48h Open House

Although most of the spaces are free and open access, 8% of the buildings require registration. We tell you what they are so you know what to look for directly.
In Barcelona city:
- Recinte Modernista Sant Pau. Itinerary to the Hospital de la Santa Creu i Sant Pau.
- Sant Pau Art Nouveau Site. Itinerary to the Sant Pau Art Nouveau Site.
- Mas Guinardó antiaircraft shelter
- Besòs WWTP
- The Cooperative Housing in Nou Barris Itinerary
- Itinerary to the Cooperative housing in Poblenou
- Pavellons de la Seat. Collection of historical cars
- Corporate headquarters of the AMB
- Prat de Llobregat WWTP
- TMB cotxeres ZAL
- Aigües del Tibidabo Tower
- Collserola Tower
Metropolitan area
Badalona
- Joan Amigó Itinerary
- Can Miravitges Farmhouse
Santa Coloma de Gramenet
- Torre Balldovina Air-raid shelter
- Cotxeres TMB L9-Can Zam
- Pallaresa Tower
- Torrribera Itinerary
L’Hospitalet de Llobregat
- L’Hospitalet dels Germans Puig i Giralt Itinerary
- Itinerary Xemeneies, Testimonies of the Industrial Past
- Passadissos de Collblanc-la Torrassa Itinerary
Sant Joan Despí
- TRAM-Cotxeres
- Itinerary From Torrent to Parc. A historical tour around the Fontsanta area
- Ter-Llobregat water supply system
Sitges
- Itinerary Sitges Antic
- Cases dels Americanos Itinerary