The Mystery Shack is a tourist trap in Gravity Falls, Oregon, which overcharges unlucky visitors for a glimpse at the world's most bizarre museum. This museum is owned and inhabited by Grunkle Stan, and is the main base for Dipper and Mabel throughout the series. It is also their home. Wendy and Soos are also employees of the Mystery Shack.
Stan has lived in the Shack for an unknown number of years, most likely several decades, and has added a museum to it no less than ten years ago. For a time, one of the most lucrative exhibits was the Gravity Falls wax museum, though Stan closed it after tourists stopped coming to see it, and there was a costume store, possibly part of the Mystery Shack itself, near the site fifteen years ago. Currently, Stan runs and resides at the Shack, and Dipper and Mabel Pines are spending their first summer away from home here. The Pines, Wendy Corduroy, and Soos make up the staff.
The Mystery Shack has no less than four exits. The main entrance, the porch entrance, a small door which leads directly to the floor room, and the gift shop door. There's also a cellar door under the gift shop window. One side of the sloping roof has the Mystery Shack name, and the other has a small platform with a cooler that Wendy often hangs out on. The roof with the "GIFT" sign also has a weather vane that has the letters W, H, A, T and a question mark instead of the the usual N, W, E, S.
There are at least three floors that we know of.
The first floor has two levels, one where most of the rooms are located and a slightly lower level for the floor room.
- Museum - The main exhibition is located here, showcasing weird oddities including: The Sascrotch, pterosaur, and jackalopes.
- Gift Shop - Get all your Mystery Shack merchandise here! Normally where Wendy works behind the counter. This room has five exits. One is the main exit of the shop. The second is a curtained doorway to the museum. A third door leads to the living room ("Employees Only"). The fourth is a ladder that goes up to the roof. And the last is a mysterious entrance behind the vending machine.
- Living room - Where the Pines often watch TV. Some features include: a table; a large yellow chair; a glass light over the chair, and behind it a bag full of money; and a dinosaur skull. There are two exits that we know of. One leads to the gift shop, and the second is a doorway to the staircase entryway. Stan also mentions a trapdoor while pawing at the stone wall when trying to escape who he at first believed to be a tax collector.
- Staircase entryway - It is a relatively small entryway which features a stuffed "dodo" perched on a table and a ball hanging in a net from the ceiling. This room has four exits besides the staircase that leads upstairs. First is the exit to the back porch. The second is a door that leads to a hallway past the stairs. The third is the doorway to the living room. And the fourth is a doorway to the kitchen directly in front of the stairs.
- Kitchen - It features the kitchen table; a wide window; refrigerator with a stuffed wolf head sitting on it; a very old fashioned stove whose smoke pipe can be seen going through the roof from the outside; and a dead or stuffed possom. There is one exit that leads to the staircase entryway.
- Hallway - the hallway connects the floor room to the staircase entryway. There's also another door that leads to the bathroom, and another that leads to the storage room.
- Bathroom - The bathroom has a small window; a bathtub; toilet; sink; cabinet; and a single light bulb. The tub is propped up by a stack of bricks on one side to keep level.
- Break Room - Which is really just a door that opens to a system of pipes that Soos was using as a "break room." Dipper donates his newly won Secret hidden room to Soos after realizing he'd rather keep sharing a room with Mabel.
- Storage room - Originally wallpapered over after Stan put the wax figures in it. There's a window where Wax Abraham Lincoln stood under and then melted under the sunlight.
- Parlor - It has a window and a fireplace. It is the location of Wax Stan's memorial, and where he was made by Mabel.
- Floor room - Mostly multipurpose, it's been converted to a dance floor and a hall of mirrors. There is also a bell rope that goes through the ceiling into the attic. This room has at least two exits, one small door leading directly outside and another above a short set of stairs that leads to the hallway. There is another door, but where or what it leads to is unknown.
- Secret hidden room - A mysteriously hidden room whose entrance was found by Soos behind a large shelf. This is where the Electron Carpet was originally discovered by Dipper and Mabel. The calender there implies the last time anyone entered was in 1982. The room also has an attached bathroom and a single stained glass window. There is also a portrait of a woman hanging on one of the walls, couches, a large tri-fold mirror, a closed off fireplace, a catalog cabinet, an old trophy, and several clocks. The door to the room itself is also intricately designed in the European style. It also has a sloping ceiling.
- Attic Floor - The attic is a spacious room where the staircase leads to. It has a large stained glass window, designed with the commonly seen Eye of Providence, and plush red window seat. The window looks out the back porch.
- Mabel and Dipper's Bedroom - Features: a triangular window that faces the same direction as the main entrance; multiple old arcade games; the bell rope that comes through the floor from the floor room; an alcove that has a fortune telling machine as well a coffin used as a T.V. table; and above that another small area with a second window (this one stained glass). There are two closets, one next to the exit (which didn't appear until "Little Dipper") and one in the alcove, where the Dipper clones shut in "Dipper Classic."
- Stan's bedroom - Where Stan sleeps. Features a painting of dogs playing poker over his bed. Also by the bed is an end table where Stan keeps his dentures before he goes to sleep.
- Stan's Office - Where Stan keeps his papers, "Miser and Son" safe, and Cloning copy machine.
- Boiler room - Features include a mattress, television, game system, bookshelf, dartboard, basketball hoop over a trashcan, and the Tumbleweed Terror pinball machine. At least, it is shown in Soos's story in the episode Bottomless Pit!, so this room may not exist.
Exhibits and merchandiseEdit
- Since "Headhunters", the "S" in "Shack" hangs off, which is a joke referring to the fact that every exhibition at the Shack is a hoax.
- Soos is the "Employee of the Month" as shown in Double Dipper.
- The Mystery Shack's address is 618, a reference to June 18, Alex Hirsch's birthday.
- The television's brand is "Worrel," named after production artist Ian Worrel.
- One of the tiles on the wall of the living room opens a trapdoor if you push it.
- In the last scene of the first episode, Stan goes through the main entrance to get directly into the Gift Shop.
- Although there's a chimney stack going through Dipper's side of the attic, logically there's no chimney on the right side of the roof, near the front of the Mystery Shack.
- Nearly every episode has the same error concerning the staircase entryway, in that several reoccurring backgrounds have the stairs flat against the wall without any space for the door that's past it.
- The back door has been seen with hinges on both the right and left sides.
- The stairs are supposed to face the kitchen's entryway but in every shot from the inside of the kitchen, the stairs are facing sideways. This was finally changed in "Boyz Crazy."
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