World 7-2

Coin 1 (before checkpoint)

To access this barricaded coin just before the checkpoint, you'll have to release the nearby Chain Chomp while he's facing right, causing him to burrow through the blockade. Simply butt-pounding pole he's chained to three times--just make sure he's facing to the right before you give it the final pound.

Coin 2 (after checkpoint)

Take this green pipe (which may be somewhat obscured by clouds)--inside you'll find the Star Coin above a water bubble.

Coin 3 (after checkpoint)

The third coin can be found between two Chain Chomps, just after the pipe which leads to the second Star Coin (if you already took the warp pipe, head left from the exit). It's easiest to drop onto the coin from the water bubble just above.