The greatest event for photography and architecture buffs in Buenos Aires, the Open House Buenos Aires which held its 4th edition this year is the best way to visit and photograph buildings that no always open to the public eye.
Part of an international family of Open House cities and organised by cohabitar urbano which is a civil association that promotes integration among the city and its people.
There were over 50 buildings and homes spread around the city. I managed to do 3 on Saturday and two on Sunday, one of them being the Bencich buildings at Roque Saenz Peña and Florida, smack downtown and one of Buenos Aires iconic intersections.
All the visited were guided by professionals and were brief and concise.
I do recommend doing it next year if your in town.