Iron Cap of the Igloo is a igloo in Luigi's Mansion 64 that contains the Iron Cap's ! Switch.
In order to reach it, the player must follow almost the exact same procedure as in the level "Down Below the Cavern" in Ice Cavern. Luigi must first get on top of Dorrie's head, and then steer it over to the small patch of ground outside the double doors. Upon entering the double doors, Luigi will be confronted with a short hallway, at the end of which is in the pool (much like the one that is used later to enter the Haunted Pool Cube) which will transport Luigi to the Iron Cap of the Igloo when entered.
The igloo is decorated with large glittering crystals and has a stream running through the middle. Upon entering the igloo, Luigi is automatically turned into Iron Luigi and is therefore invulnerable to the stream's current. The only enemies that appear are Snufits and Goombas. If the player hurries, they can quickly defeat the few of them guarding the Green ! Switch and press it. All the green ! Blocks in the game will then activate, granting access to the Iron Cap in later courses.
Level[]
There are only one mission seen in this world.
Star: Red Coins of Iron 'N' Ice[]
There are eight Red Coins to be collected here, and several of them are just below a huge waterfall leading into the stream. The only way to reach them is by becoming Metal Luigi. Once every Red Coin is collected, the Power Star will appear behind a small island near the waterfall at the other end of the igloo.