Skyward Stalk, or Sparkling Waters-, is the secret course of Sparkling Waters in New Super Mario Bros. U. It is unlocked via the secret exit in Haunted Shipwreck. Its completion skips Soda Jungle and unlocks Rock-Candy Mines and Fuzzy Clifftop. Its name may be a reference to The Legend of Zelda: Skyward Sword, another game produced by Nintendo.
The course's main feature is a constantly growing beanstalk that sprouts giant leaves and other plant life. The level autoscrolls upward.
 Star Coins
- Star Coin 1: To the left side of the course, on a leaf.
- Star Coin 2: On an orange bridge, covered by light clouds.
- Star Coin 3: Near the end of the course, to the right side.
 Names in Other Languages
||El misterio del tallo dorado
||The Mystery of the Golden Stalk
||Sus au haricot !
||Addition to beans!