Aviation Exhibit

The Aviation Exhibit is a room in Treacherous Mansion in Luigi's Mansion: Dark Moon. This room is accessed via the top left most door in the West Corridor. The Aviation Exhibit has various displays related to planes and other aircraft, including a plane model to the right, tables with hot air balloon displays near the south and a giant balloon in the centre of the room.

History
In E-2: Double Trouble, the Aviation Exhibit is an entirely optional area that isn't required to be visited. If Luigi does go in however, he can get a gem by pulling on the sandbags attached to the balloon in the centre of the room to pull the grate in the floor up. He will, however, have to fight a Strong Hider and two Strong Greenies beforehand.

In E-5: Paranormal Chaos, the mission's Boo has made the balloon in the centre of the room invisible. Revealing it with the Dark Light will let Luigi capture him.

In E-Bonus: Terrifying Invasion, the Aviation Exhibit might be one of the rooms infested with ghosts.