Spike's Spouting Sands

Spike's Spouting Sands, or Layer-Cake Desert-4, is the fourth course of Layer-Cake Desert in New Super Mario Bros. U. It is unlocked by completing Stoneslide Tower, and completing this level unlocks Blooming Lakitus and, via the secret exit, Piranha Plants on Ice.

Layout
The course takes place in the part of the desert with Moai Heads and slanted structures. The main platforms are Moai Heads, but unlike the others introduced, they are immobile. Spikes appear in this course and throw Spiked Balls, usually on rising Sand Geysers.

Star Coins

 * Star Coin 1: Below a structure of orange bridges.
 * Star Coin 2: The first Sand Spout after the first star coin, has a vine above it that leads to a room with the second Star Coin.
 * Star Coin 3: After a hidden room with a Mini Mushroom, the player must dash through various Sand Spouts to reach the final Star Coin.

Secret Exit
Using a Mini Mushroom, the player must head to the structure left of the Spike that comes after the third Star Coin to get to a Cannon Pipe that leads to the secret exit. The secret hole is found at the very bottom of the tower. Alternatively, the player can also run and crouch to slide through the small hole, although when the player enters, the coins will be out of reach without Mini Mario. The exit unlocks Piranha Plants on Ice.

Enemies

 * Spikes
 * Koopa Troopas
 * Koopa Paratroopas