New Super Mario Bros. U: Superstar Road-6 -- Fire Bar Cliffs

The fire bars here are enormous, making dodging them somewhat difficult. You'll want to get the Fire Flower from the item boxes, not because there are enemies that die from fireballs, but for the extra hit you can take. Several of the fire bars have donut lifts below them, so you can't stay there for long, unless you keep jumping. The first Star Coin is in a small pit above a fire bar. Next is a fire bar over some donut lifts. Duck under the fire bar in the center and jump to keep the donut lift in place. When the fire bar goes away, keep going. To the right is a fire bar in a rock wall. When the path is clear, run to the right and wall jump up into the left corner to avoid the fire bar. Once you leave that area, things become more open. Use a Koopa shell to hit a brick block on the side of a rock for a 1-up. There's a hidden area to the left of the first fire bar in the open area. Drop down to a pipe. This takes you to the the second Star Coin, which is guarded by three triple fire bars. Go up and over the top fire bar, get the item in the item block if you need it, then carefully climb the grate to get the Star Coin. Return through the same pipe. The next three fire bars are in sync and the fourth one goes in the opposite direction. If you're careful, you can make it across without any damage. The pipe will take you to the second part of the level, which is largely vertical. Dodge the fire bars and Buzzy Beetles and climb up. Drop down to the left of triple fire bar for a hidden pipe. This will take you to the third Star Coin, guarded by a triple fire bar. Run to the left, but do not run so far that you can get all the coins on the ground. Jump up before you collect all the coins and collect the Star Coin. Return to the main level. Keep climbing up and you'll see some uneven fire bars with three fireballs on one side and one on the other. Jump over them when only one fireball is present and you'll soon reach the top and the pipe. Run past the fire bar to the flagpole. This opens the path to a Mushroom House.