This weekend, 22-23 October, is the second edition of 48 h Open House BCN, Barcelona architecture festival.

Barcelona opens up its buildings to the public, in total 155 buildings which: The Torre de Collserola, Central del Circ, Palau Moxó, the Hotel Espanya and the Montjuïc Cemetery are some of the spaces that have been added for this year's edition of Open House BCN. Like last year, Open House gives you the chance to visit some buildings that aren't normally open to the public, such as people's houses and private properties.

Additionally Barcelona offers a lot of activities including routes and a photography competition. On e of them is a photography competition, OpenFoto. All entries submitted will be posted on the competition's website, and the winner will receive a large-format print of his or her shot.

Also launching this year is the online soundmap, OpenRemix, which suggests different sounds for the various spaces. People who go to the buildings participating in this year's Open House are also invited to expand this soundmap by recording what the places they visit sound like or proposing a phrase or piece of music that they consider fitting for the space in question.

Several routes have also been put together, which allow you to discover everything from Barcelona's cemeteries to Sagnier's Barcelona and the new-look Passeig de Sant Joan, among others. Information about any incidents or last-minute changes to the event programme will be published on the 48H Open House BCN website.