World 2-4 (Super Mario Bros.)

World 2-4 is the fourth and final level of World 2 in Super Mario Bros. and the eighth level overall in said game.

Layout
The player starts at the top of some stairs that lead to a pit of lava with Podoboos jumping out and platforms placed above it. Above the center platform is the only ? Block in the level, containing a power-up. After the lava are two paths lined with Fire-Bars, with the top path having more than the bottom. Next are two lifts moving in opposite vertical directions, followed by some gaps before coming to the fake Bowser, which breathes fire as the player is jumping across the gaps.

Super Mario Bros. Deluxe challenges
In Super Mario Bros. Deluxe, the player can collect five Red Coins, find a hidden Yoshi Egg, and get a medal based on their score. The Yoshi Egg is found in a Hidden Block above the Empty Block before the fake Bowser, and the score to beat is 14000 (13000 in the Japanese version ). The Red Coin locations are:
 * High above the right side of the lava pit
 * At the end of the top Fire-Bar path
 * At the top of the lift moving up
 * Above one of the gaps before the fake Bowser
 * Above the fake Bowser