World 3-8

World 3-8 may refer to:
 * World 3-8 in Super Mario Bros. 3.
 * Naval Piranha's Castle, World 3-8 in Super Mario World 2: Yoshi's Island.
 * Castle of Priscilla the Peckish, World 3-8 in Yoshi's Island DS.
 * King Clawdaddy's Sewer Castle, World 3-8 in Yoshi's New Island.
 * Miss Cluck the Insincere's Castle, World 3-8 in Yoshi's Woolly World.