Photo of the old Milan Zoo. I originally thought this was a big cat house but it looks different from the one in the video (link below). This building is now a kindergarten
I believe the zoo closed in 1992, apparently homeless people moved into the zoo cages after the animals were moved out.
Below is a link to a poorly translated page which features a bit of film footage of the zoo.
http://translate.google.co.uk/translate?hl=en&sl=it&u=http://it.wikipedia.org/wiki/Giardini_pubblici_Indro_Montanelli&prev=/search%3Fq%3DVasca%2Bdelle%2BFoche%2Bal%2BVecchio%2BZoo%2Bdi%2BMilano%26biw%3D1024%26bih%3D590