World 6-S

World 6-S or World 6-Secret may refer to:
 * Endless World of Yoshis, World 6-S in Yoshi's Island: Super Mario Advance 3.
 * Leapin' Lava Meltdown, World 6-S in Yoshi's New Island.
 * Skeleton Goonies' Lava Lair, World 6-S in Yoshi's Woolly World.