World C

World C is the fourth secret world that was first featured in the game Super Mario Bros.: The Lost Levels. After clearing this world, the player will gain access to the final world in the game, which is World D.

World C-1
This night time, snowy overworld level mostly has Piranha Plants and Green Para-koopas. There's a warp pipe that leads to a staircase made of blocks with coins. There's also two Poison Mushroom on this stage so watch out.

World C-2
This stage takes has no snow, unlike the first stage, and is mostly contains bridges and mushrooms-like platforms. There are dangers from above and below with jumping Cheep-Cheeps, Bloopers, and off screen Bullet Bills. This stage is pretty much strait forward dangerous with no ? Blocks, Brick Blocks, or Warp Pipes.

World C-3
This stage has Mushroom-like Patforms and springs. The only enemies here are Lakitu (with Spinies) and both Red and Green Para-koopas. There is also strong wind in this stage that blows against you.