The Kingdom Castle is the main "attraction" of Ratboy Genius' Kingdom, as well as his living quarters. The castle's moat connects to the Ratboy Canal, and at the back of the castle is a swimming pool with a diving board. At the front is a pair of metal gates (which are always open), each being made out of a row of battlements attached to metal rods. Behind the gates are a row of tall hedges, and dividing the center of the front is a concrete road that leads to the drawbridge.