Deepsea Ruins, or Soda Jungle-5 is the fifth course of Soda Jungle in New Super Mario Bros. U, located in the haunted sub-area of Soda Jungle. It takes place in a presumably steaming lake. This level uses the volcano underground music theme from New Super Mario Bros. Wii.
Completing the course normally makes a path that leads back to the first point after Which-Way Labyrinth, but completing the level with its secret exit reveals the true path through Soda Jungle.
The level begins above the water, with Stone-Eyes acting as prominent platforms, similar to Stone-Eye Zone. Fish Bones are encountered in the water, and Circling Boo Buddies are also found. There is a Warp Pipe at the end of the area, leading to the next area. The second area takes place in a dark underwater cave. Jellybeams and Fish Bones are found at the beginning of the area, as well as a ? Block containing a power-up. Stone-Eyes are found, acting as walls, along with Circling Boo Buddies. A Red Ring is also found. Some more Fish Bones are found, along with Stone-Eyes that move forwards when approached. A Jellybeam follows, as well as a Warp Pipe leading to the next area. The Checkpoint Flag is found, as well as a Bulber and Circling Boo Buddies. The area continues vertically, where more Stone-Eyes, Bulbers, Fish Bones, and Circling Boo Buddies are encountered. A ? Block containing a Super Star is found in between two Stone-Eyes. A group of Stone-Eyes begin to fall when approached, along with more Bulbers. A Warp Pipe at the top of the area leads to the Goal Pole area, with Stone-Eyes acting as platforms.
Unlike most secret exits in the game, this course's secret exit is required to continue through Soda Jungle, like Painted Swampland. A Warp Pipe leading to the secret exit is immediately to the right of the third Star Coin.
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