Moonlight Kingdom

Moonlight Kingdom is a rare anomalous area in Super Mario 64. It appears as a replacement for the Castle's Ground Floor, a similar layout to the main foyer. This area has a night time aesthetic, as opposed to the standard Castle's daytime aesthetic.

Geography
The room appears to be large and flat, with one large staircase in the front with small platforms leading up it. At it's top is a Star Door, which presumably leads to the Second Floor. There appears to be no way to access the Basement or the Courtyard.

There is a painting to the player's left that leads to a course titled Misty Mountain. This course is currently undocumented, and it's contents are unknown. It is theorized to be a replacement or scrapped version for Tall, Tall Mountain due to their similar names.

Unlike the standard Ground Floor, there appear to be no coins for the player to collect.

Documentation
There is to date only one video documenting Moonlight Kingdom, however it has since been privated.