World 4-Castle

is the name of a few different castle levels:
* in New Super Mario Bros..
* in New Super Mario Bros. Wii.
* in New Super Mario Bros. 2.
* in Puzzle & Dragons: Super Mario Bros. Edition.
==See also==
*Wendy's Shifting Castle, the of New Super Mario Bros. U.
*Wendy's Thwomp Castle, the of New Super Luigi U.
*Lava Rock Lair, the of Super Mario 3D World.