Meteor Moat

Meteor Moat, or Peach's Castle-1, is the first course of Peach's Castle in New Super Mario Bros. U. It is unlocked via completion of Boarding the Airship and its own completion unlocks Magma-River Cruise, while the secret exit unlocks Firefall Cliffs.

Layout
Like World 8-1 of New Super Mario Bros. Wii, the course is bombarded with Volcanic Debris, though unlike the aforementioned level, Meteor Moat does not exactly show where the fireballs come from. The platforms and ground in this course constantly move up, down. left, and right into the lava.

Star Coins

 * Star Coin 1: In plain sight, under a few Brick Blocks.
 * Star Coin 2: Underneath some Brick Blocks, the player must use Super Mario or the raining debris to break them.
 * Star Coin 3: After the P-Switch, behaving like the ground. The player must jump to the Star Coin and wall jump back up just before the platform starts sinking under the lava. Alternatively, the player can use the Ice Flower to freeze a nearby Bony Beetle and use it to grab the star coin.

Secret Exit
Hit the P-Switch before the third Star Coin and dash across the coins-turned-Brick Blocks to reach the pipe in the air to get to the red Goal Pole. This unlocks Firefall Cliffs.

Enemies

 * Koopa Troopas
 * Bony Beetles
 * Volcanic Debris