Gargantuan Grotto

Gargantuan Grotto, also known as , is the seventh level of World Star in Super Mario 3D World. It is unlocked after completing Honeycomb Starway, and its own completion unlocks Peepa's Fog Bog.

Green Stars

 * Green Star 1: After the stamp, behind a wall of Blurkers.
 * Green Star 2: In the area with the second Mega Mushroom, the player must use the mushroom trampolines to break through two layers of Mega Blocks. The Green Star is beyond the second wall.
 * Green Star 3: Inside a bonus area, which is located above the pipe leading out of the underwater section. The player needs to use a Mega Mushroom to collect all the Blue Coins and reveal the Green Star.

Stamp

 * At the start of the level, enclosed in some Mega Blocks. A Mega Mushroom is required to reach this Stamp.

Enemies

 * Goomba Towers
 * Goombas
 * Big Galoombas
 * Micro Goombas
 * Blurkers
 * Bloopers