-If the monkeys are put in an exhibit at ground level, occasionally the Chimpanzees will escape from their exhibit. It is is better if you lower the ground about two or three levels then put a wall on top next to the pavement. However, do not put it on the low ground. The monkeys won't be able to reach the fence to jump out. Do not put any trees close to the edges as they could climb the trees. You now will have an inescapable exhibit. This can also be done for other animals.
-To prevent monkeys from escaping, make the land higher than the normal height and do this until you can see the dirt. After that, they will not escape.