New Super Mario Bros. U: Soda Jungle-2 -- Bridge over Poisoned Waters

Purple water makes a reappearance in Soda Jungle and it's just as lethal as always. There are logs in the water that spin when anything stands on them. Keep jumping on the logs to keep from falling in the water. The Acorn Mushroom you can get is very helpful here. There are some pipes that make an infinite amount of Goombas. Under the second of these pipes is the first Star Coin. After that, you'll see some brick blocks moving over the water. One of the logs has a lot of open space above it. There are three tiers of invisible blocks over it, leading to a pipe. There's a P-Switch in the lower left corner and the second Star Coin is out of reach. Activate the P-Switch and run along the brick. More brick will appear where you step. Wall jump up to the level of the Star Coin and go past it, to the POW Block in the upper left corner. Once the P-Switch power runs out, use the POW Block to make the second Star Coin fall to the ground, along with a lot of coins. Return to the main level and go past a log with lots of coins to reach the midpoint. Next is a set of brick blocks that will appear out of the water, then return into it. Carefully step on them and follow them to the third Star Coin. You'll also come across a nearby Red Coin Ring. Once you return to solid ground, you'll see pillars of land. There's a low brick block between two of the land pillars. Hit it with a shell to make a vine appear. This vine will take you to the red goal, which opens a shortcut to Soda Jungle-6 and -7. Otherwise, keep going to the right for the regular goal, which opens the path to the Fort.