The theme park sits on what used to be a berry farm that was built by Walter Knott, Cordelia Knott, and their family. Starting around 1920, the family started selling berries, berry preserves, and pies from a roadside stand along a highway. In 1934, the Knotts started selling fried chicken dinners inside a tea room that is on the farm. They later built shops and other attractions to entertain visitors. In 1940, Walter Knott built a ghost town on the farm, and added other attractions over many years. In 1968, Knott's Berry Farm started to charge people to visit the park. In 1983, the park added Camp Snoopy.