[Two of the buildings you can visit in my neibourhood, an incredible hotel where Woody Allen played jazz, Hotel Casa Fuster, and an amazing youth hostel called Alberg Mare de Déu de Montserrat]
48H Open House BCN means the chance to visit more than 160 amazing buildings in Barcelona, next weekend, and completely for free. I think it's a really interesting activity, as many of the buildings are not usually open to the public for a guided visit. Here is the information so you can choose what to see. You can explore buildings through the Open House project in London, New York, Dublin, and many other cities worldwide. Visit their website for more details. Enjoy!