World 5-5 (Super Mario Bros. 3)
From the Super Mario Wiki, the Mario encyclopedia
Almost the entire level is made up of Donut Lifts. Mario starts on a Wood Block, with two Koopa Paratroopas and a Para-Goomba nearby. Afterwards, there are some more Wood Blocks, one of them with a power-up inside, some Brick Blocks blocking Warp Pipes, and some ? Blocks, one also containing a power-up. These are guarded by another Koopa Paratroopa and two Venus Fire Traps. Shortly after this, there are two rows of coins above and below a Donut Lift bridge, along with a Fire Chomp. There are also some Venus Fire Traps, as well as Wood Blocks and Brick Blocks, two containing power-ups. This is followed by a Para-Goomba and some more Koopa Paratroopas; after this, the player reaches the goal.
By entering the second Warp Pipe at the beginning of the level, the player can find a bonus area with some coins and a Tanooki Suit.