Which-Way Labyrinth

Which-Way Labyrinth, or , is the Ghost House located in a Haunted sub-area of Soda Jungle in New Super Mario Bros. U. It is unlocked via completion of Snake Block Tower and its completion unlocks Painted Swampland and Deepsea Ruins.

Layout
The player starts in a room with five doors and a couple of Boos and a ? Block containing a power-up. The doors on the bottom and top-left are fake.

The top-right door leads to a room with Broozers and a large platform that sinks when the player steps onto it. If it sinks too low, the player will be dropped into poison. Entering the door at the bottom-right will take the player back to the main room.

The left-most door leads to a room with Boos and a platform that rises when the player is on it. Partway up is a ? Block with a Glowing Baby Yoshi, which is capable of eating the Boos. At the top is a door that leads the player back to the main room.

The right-most door leads to a dark hall lined with Scaredy Rats and a ? Block at the beginning of the hall that contains a Glowing Baby Yoshi. Several platforms are in this room; some floating, others connected by stairs. In the center of the room is a P Switch, which reveals nearby Blue Coins. At the end of the hall is a door leading back to the main room, though the door above, accessed by a hidden passage, leads to a stairway above the main room, which is where the player needs to go.

The staircase has two doors: one at the end of the first flight of stairs and a hidden one after the fake door, which is accessed by jumping over the wall. The hidden door leads to a rooms filled with coins as well as the second Star Coin. The door at the end of the first flight of stairs leads to a room with a tilting platform and a number of Boos and Big Boos. The platform gradually lowers as time continues. If the player still has a Glowing Baby Yoshi, it can make going through the room easier as it can eat the Boos. Partway down, the platform will suddenly drop and a ? Block containing a Super Star will show. At the bottom of the room is a door that leads to the Goal Pole. Hitting the flying ? Block at the right time will allow the player to reach the top of the pole.

Star Coins

 * Star Coin 1: Through the top-right door in the first room. Broozer is required to break the wooden blocks on the left side.
 * Star Coin 2: Through the bottom-right door in the first room, the player must head all the way to the left in the next room to the secret door, then the player should do the same for the next to get to the area with the second Star Coin.
 * Star Coin 3: Through the bottom-left door in the first room, the player must ride the platform past the door and reach the ceiling to get to a secret area. The player should move to the right for the third Star Coin.

Secret Exit
The player should continue from the same area as the third Star Coin to reach the secret exit. This unlocks Flight of the Para-Beetles.

Enemies

 * Big Boos
 * Boos
 * Broozers
 * Scaredy Rats