The Mystery Shack is a tourist trap located in Gravity Falls, Oregon, which overcharges unlucky tourists. This museum is owned and inhabited by Grunkle Stan, and is the main house for Dipper and Mabel throughout the series. It is also their temporary home for the summer. Wendy Corduroy and Soos are the employees of the Mystery Shack, along with Mabel and Dipper. The Shack's full address is 618 Gopher Road, Gravity Falls, Oregon.
Stan has lived in the Mystery Shack for an unknown number of years, most likely several decades, and at some point added a museum to it. For some time, one of the most lucrative exhibits was the Wax Museum of Mystery, though Stan closed it after tourists stopped coming to see it. There was also a costume store 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 there. The Pines, Wendy Corduroy, and Soos make up the staff.
In "Dreamscaperers," Gideon Gleeful has his father partially demolish the Shack with a wrecking ball after he successfully steals the deed to the building. Gideon had made plans to build an amusement park called "Gideonland" over the property in "Gideon Rises." The Shack was quickly rebuilt soon after Gideon was thwarted.
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 (The "S" in "Shack" having fallen off), 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, and T, along with a question mark, instead of the usual N, W, E, and S.
There are at least three floors that we knew 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 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 which Stan entered during "Tourist Trapped" and "Gideon Rises".
- Living room - This is 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.
- Stan's office - Where Stan keeps a "Miser and Son" safe and the Mystery Shack deed, and the Cloning copy machine. The office is located next to the living room, as revealed in "Dreamscaperers," when Gideon blew up the safe which blew out a hole in the wall between the two rooms.
- 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; a 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 possum. 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 - It is 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 July 4 1982. Interestingly, old glasses are found on a cupboard in the room. 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 - A spacious room where the staircase leads. It has a large stained-glass window, designed with the commonly seen Eye of Providence, and plush red window seat. The window overlooks the back porch.
- Mabel and Dipper's bedroom - It 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 as a coffin used as a TV table, and a small area with a second window (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 - This is where Stan sleeps. It 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.
- Underground laboratory - It is accessed via a passageway behind the vending machine in the gift shop. It contains a number of electronic devices and computers, as well as a desk with several books that Stan keeps a copy of Journal 1 in between. Beyond the desk is a large room containing an as yet unknown device that is activated by using all three journals. There is also a Symbol on the machine that is the same as that of Stanford's tattoo
- Boiler room - It features a mattress, television, game system, bookshelf, dartboard, basketball hoop over a trashcan, and the Tumbleweed Terror pinball machine (At least, as it is shown in Soos's story in the episode "Bottomless Pit!," so this room may not exist).
Exhibits and merchandise
- Intro: "Gravity Falls Main Title Theme"
- 101. "Tourist Trapped"
- 102. "The Legend of the Gobblewonker"
- 103. "Headhunters"
- 104. "The Hand That Rocks the Mabel"
- 105. "The Inconveniencing"
- 106. "Dipper vs. Manliness"
- 107. "Double Dipper"
- 108. "Irrational Treasure" (mentioned)
- 109. "The Time Traveler's Pig"
- 110. "Fight Fighters"
- 111. "Little Dipper"
- 112. "Summerween"
- 113. "Boss Mabel"
- 114. "Bottomless Pit!"
- 115. "The Deep End"
- 116. "Carpet Diem"
- 117. "Boyz Crazy"
- 118. "Land Before Swine"
- 119. "Dreamscaperers"
- 120. "Gideon Rises"
- 1. "Candy Monster"
- 2. "Stan's Tattoo"
- 5. "Tooth" (mentioned)
- 6. "The Hide Behind"
- 7. "Mabel's Guide to Dating"
- 8. "Mabel's Guide to Stickers"
- 9. "Mabel's Guide to Fashion"
- 10. "Mabel's Guide to Colors"
- 11. "Mabel's Guide to Art"
- 12. "Fixin' It with Soos: Golf Cart"
- 13. "Fixin' It with Soos: Cuckoo Clock"
- 14. "TV Shorts 1"
- 15. "TV Shorts 2"
- 201. "Scary-oke"
- 202. "Into the Bunker"
- 203. "The Golf War"
- 204. "Sock Opera"
- 205. "Soos and the Real Girl"
- 206. "Little Gift Shop of Horrors"
- 207. "Society of the Blind Eye"
- 208. "Blendin's Game"
- 209. "The Love God"
- 210. "Northwest Mansion Mystery"
- 211. "Not What He Seems"
- Oddity Creator
- Mystery Shack Mystery
- Postcard Creator
- The Twin Mystery Vortex of Doom
- Fright Night
- Rumble's Revenge
- Attic Stuff Golf
- Mystery Shack Attack
- Li'l Gideon Shrinks Back
- Villains Unite!
- Since "Headhunters," the "S" in "Shack" hangs off, spelling "Mystery Hack," 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, the birthday of Alex Hirsch and Ariel Hirsch.
- 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.
- Stan hides his arrest warrants under the carpet in the gift shop.
- Before Mabel and Dipper arrived at Gravity Falls, the Mystery Shack had three hidden rooms- the storage room housing the wax figures, the room containing the Electron Carpet and underground laboratory.
- According to the Mystery Shack Mystery game on the official site, Mabel's bed smells like peach lip gloss and graham crackers.
- A real life counterpart of the decorative stained glass lamp that hangs behind the living room couch hangs in Alex Hirsch's office.
- Stan traded beads and jackalope pelts to get the totem pole in front of the shack.
- The letter “H” appears in various locations throughout the Mystery Shack. The “H” is for Hirsch.
- While called a shack, the Mystery Shack more closely fits the definition of a cabin.
- There are tablets with runic letters inscribed on them. The runic tablets (see list of items in the Mystery Shack) includes the runes (top to bottom, left to right): unknown, odal, madr, (variation of) Sigrune, and logr.
- All of these runes, except for the one that is a backwards N (a variation of Sigrune) are all from Elder Futhark.
- Unknown Rune: The name is not known anymore, but the symbol likely means giant or titan.
- Madr: The symbol means man.
- Unnamed variation of Sigrune: This symbol is the victory rune. It is the only rune on the tablet to not originate from Elder Futhark.
- Odal: This symbol means real estate, or non-movable property. It is the last symbol in the futhark.
- Logr: This symbol is probably the rune "logr", but is no longer known to be fully true. This rune either means onion, or water, stream or sea.
- 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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