World 8-1 is a level found in the game New Super Mario Bros. Wii.
This level is completely filled with lava. At the start, a dark volcanic ash cloud will chase Mario from the start to the end of the level, slowly consuming the entire level. If Mario touches the cloud, he dies instantly. Volcanic Debris also falls from the sky, and this is the first level with lava geysers. At some parts of the level, Mario will find a metal platform floating above the lava which will start to sink if Mario steps in it. Buzzy Beetles are very common at this level.
- First Star Coin: Not long before the Checkpoint Flag is a long platform, and the first Star Coin is to its high right. Mario and co. must wait for the platform to tilt all the way to its left and then jump up to get the Star Coin.
- Second Star Coin: Mario and co. must pick up the POW Block and activate it near the row of three Brick Blocks and two ? Blocks before they are destroyed by Volcanic Debris. This will make the second Star Coin fall down and become attainable.
- Third Star Coin: Instead of exiting with the usual Green Pipe, Mario and co. must go past it. Once there, Mario and co. can either let the Volcanic Debris destroy the third Star Coin-caging Brick Blocks and use the Trampoline to jump up to the Star Coin, or do both jobs with the Trampoline (the former is required if Mario and co. doesn't have at least a Super Mushroom).
- Volcanic Debris