Mystery Shack

The Mystery Shack was a shack within which Dipper, Mabel, and Stan Pines were once present.

History
While the three were present, the Tenth Doctor clipped the roof of the building with the TARDIS, leading Dipper and Mabel to scream. The TARDIS was then piloted inside the shack, leaving the trio in a state of shock as Stan suggested that they see what's on TV. (TV: Untitled)

Behind the scenes
The Mystery Shack originates from the Gravity Falls series.