The Zoo was once part of The Citadel but has gone to ruin since it's fall in 4058 M.E. Amazingly, many of the animals inside appear to be the descendants of the animals originally kept there, still living inside their locked cages. Goats, tapirs, and a large variety of fish can still be found there, even if they are a bit starved. Evidence of at least one wolverine still living out of its broken cage can be found too.
Apparently, the crocodiles and monkeys also escaped their cages and stuck around to harass modern visitors.
This was also the place of the infamous Grandsome and the Monkey incident.