The Face-Space Mansion (Famous Comet Observatory in PAL regions) is the first mansion to explore in Luigi's Mansion 9: Boo Mario Strikes.
US: Hmmm, this place looks familiar. Anyhoo, your brother passed by here!
PAL: Your Observatory from SMG is here. Mario passed by, so go find him, posthaste!
- The Terrace's Secret (Inside the Terrace)
- Strong Thwompers Strike! (Attack of the Thwompers!)
- Boo's Bedroom Broom (The Haunted Broom)
- Sooth the Soul (Ghost Party)
- The Fountain's Thirst (The Fountain is Thirsty)
- Boss: Ghostalina Strikes! (Rosalina's Ghost)
The Face-Space's domes look small, but look expanded inside. a doll rests in the bedroom, along with a broom. the Kitchen has Special Punchers who play with kitchen utensils. The fountain's streams go into a black hole, as the inside has a haunted water fountain. You fight Ghostalina in the Garden which has a battle arena in a black void surrounded by floating shrubs that Ghostalina attacks you with.