Bathrooms are essential amenities for any park in Prehistoric Kingdom. They come in the form of large and small modules, which can be decorated via modular building. There are also a few official bathroom prefabs available in the game by default.
When a guest's bathroom satisfaction level is low, they will seek out a bathroom and occupy it for a while. Larger bathrooms can accommodate more people. Good overall bathroom satisfaction contributes to a high park facilities rating, as can be checked in the Management View.