Zoo of Intropolis City:

A zoo with tall, lumbering walls that seemed to have survived any and every sort of attack that might have ever befell them, they hold up a stunning 20 feet high into the air, and age a wild sort of creatures. The cages on the inside are usually battered, with the bars broken to that the animals roam as they please in mass hoards though, so it's understandable why few dare to come 'visit the zoo'.