It is also based off Boring, Oregon, a town Alex never saw himself, but always imagined what it might be like.
It was founded by Quentin Trembley, but in an attempt to cover it up was said to be founded by Nathaniel Northwest.
It's where Stan Pines lives and runs the Mystery Shack, a tourist trap which overcharges unlucky visitors for a glimpse at the world's most bizarre museum.
12-year-old twin siblings Dipper and Mabel Pines, who are Stan's greatnephew and greatniece, are sent to stay with Stan for the summer, which leads them to discover the different yet curious wonders of Gravity Falls.
Gravity Falls, Oregon may be based off of the Oregon Vortex, which is located in Oregon, and residents claim paranormal activity occurs there.
1883 was later marked by numerous disasters and catastrophes, including the Great Flood, which took the lives of many lumberjacks formerly involved in the construction of Northwest Manor, and the Great Train Crash, in which a passing conductor grew distracted by a "flash of light" and inadvertently sent his train off a cliff.
Since the town was founded by a mayor who was legally insane, its arcane charter laws are equally insane. The "Finders Keepers" law allows whoever holds a physical deed to own that property (created by Trembley as an experiment to institute a new form of government called "Gimmie Ocracy") and children can legally be sent to adult prison.Gravity Falls saw a population boom in the early 1860s as American pioneers travelled the Oregon Trail, many of whom ended up settling in the town.Among those who chose Gravity Falls as their home were settlers Grady and Fertilia Mecc, who are credited with the invention of the "High Five" and holding a record number of 42 offspring.Uniquely, the prehistoric beasts of the area did not perish from the impact of a meteor, as purported by the common theory; conversely, many became buried alive in tree sap, frozen within the bowels of the Earth and remaining there for eons.According to tree ring interruptions and radiation tests, the entire valley of Gravity Falls was formed by an alien spaceship crash-landing into Earth around 35 million years later.As explained in the episode "The Stanchurian Candidate," the Town Charter stipulates that Gravity Falls mayor elections are based on two events: The Wednesday Stump Speech, held on an actual stump, and the Friday Debate wherein townsfolk throw birdseed at the candidate they like most.