From 1875 until 2016 there was a small zoo in the middle of Buenos Aires. With progress, the larger animals were relocated to nature reserves, and the area was turned into a park.
The park retains many of the old zoo buildings (some is less than pristine condition) as well as some of the small animal and birds, while being enhanced with a return of a more natural setting.
Also scattered throughout are many sculptures. Overall it is a pleasant setting to stroll around for a couple of hours.