Bowser's Castle is a castle belonging to Bowser.
Bowser's Castle is basically just a regular castle. The only difference is that it has a giant Bowser head on the top (which is only present in the first 3 Mario & Luigi games as well as the latest installment). It has two towers on either side of the head, wich is in the middle. It is a dull brownish color, and is smaller than Princess Peach's Castle.
- In Mario and Luigi: Superstar Saga, Mario and Luigi: Bowser's Inside Story, Mario and Luigi Dream Team, Mario and Luigi Paper Jam, and Mario and Luigi Superstar Saga + Bowser's Minions. Bowser's castle can fly.