World 8-6

World 8-6 is the name of several different levels, all of which are lava-themed:
*World 8-6 in New Super Mario Bros..
*World 8-6 in New Super Mario Bros. Wii.
*World 8-6 in Super Mario 3D Land.
*World 8-6 in Puzzle & Dragons: Super Mario Bros. Edition.
*World 8-6 in Super Mario Maker for Nintendo 3DS.