Red Moon Monastery

Red Moon Monastery is an anomalous level found in certain personalized copies of Super Mario 64. It is typically found in an anomalous part of the castle known as the Lunar Tower, although the method of unlocking the tower can vary. The stage itself resembles an alternate version of Big Boo's Haunt, which lead some to believe  the stage was cut due to being too similar. The stage is most well-known for having a large, red moon in the skybox, which is where the name comes from. It is also known for having an ever-present red tint and prominently featuring the Red Boo instance of Enemy Discoloring and Dry Bones in the subarea. Music tracks for this level have been found, and they can be listened to here and here.

Geography
The stage is described as a church-like building in the center of a sizeable forest, with most of the stage taking place in the building. Under the main part of the monastery, there is a basement that holds most of the boos, which are usually reported to reveal a star when they're all defeated. The basement is has an entry to a subarea, being a catacombs, which holds many of the anomalous Dry Bones enemy. Players commonly report finding a key in the sixth mission of the catacombs, although what it unlocks is not always agreed upon or even found.

Missions
The course has had many claimed stars, but the only star that has been definitely proven to exist is the first star, known as "OVER THE CHANCEL" which can be found floating in the first room. The second most commonly reported star is one found in the basement, which requires defeating a certain amount of boos. The more dubious claims are needing to collect keys to unlock something, breaking boxes to obtain a star, using a vanish cap to phase through stained glass, and rare reports have claimed the fifth mission opens the entry to a boss.