Hydrox Park is an aquatic location in Splittsboro, made for it's aquatic citizens. It is a giant cube of water, which takes up a sizable quadrant of the city. Finn lives here. Boats are able to sail on top of the cube. A controversial element of the park is that it allows fisherman to use the park, to capture the citizens, without running into any legal or ethical trouble. Hydrox Park first appeared in "Exchange Student from the Black Lagoon".