World 2-3 (Super Mario Bros. 3)
From the Super Mario Wiki
The level is main up of several pyramid structures made up of either Semisolid Platforms or Brick Blocks. The first pyramid has a Firesnake, a Koopa Troopa, and a power-up in the ? Block to the right on top, the second pyramid has two Firesnakes and a Starman power-up in the right ? Block on top, and the third and tallest pyramid has more Koopa Troopas and a Firesnake, along with a power-up in the ? Block to the left on top. Afterward are the pyramid structures made up of Brick Blocks with several Pile Driver Micro-Goombas hidden within. Above the Brick Block pyramids is a hidden Switch Block that can turn the pyramids into coins and allow the player to collect a 1-Up Mushroom. Beyond the brick pyramids is an enclosed structure with two Koopa Troopas moving around inside it. By kicking a Koopa Troopa into the bricks, the player can uncover the Warp Pipe that leads to the goal.