Roof

There are four notable roofs in the Mario series:
 * The Roof-like room of Luigi's Mansion in the game Luigi's Mansion.
 * The Roof that appears as the last level in Mario vs. Donkey Kong 2: March of the Minis.
 * The Roof of Princess Peach's Castle.
 * The Roof of Big Boo's Haunt in the games Super Mario 64 and Super Mario 64 DS.