One of Bowser's many castles

Bowser's Castle (also known as Bowser's Fortress or Bowser's Keep) is the domicile of Bowser and base of operations for the Koopa Troop. Bowser has actually built many castles throughout the Super Mario series, all of them appearing as dark, forbidding medieval structures, often with stone reliefs of Bowser himself carved into them. The exact appearances and layouts of each castle vary, but all of them are filled with various traps and creatures that Mario must battle through in order to reach Bowser himself.

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