where was national lampoon's christmas vacation filmed

The movie National Lampoon's Christmas Vacation was filmed entirely in California. The majority of the movie was shot in Los Angeles, with some scenes also filmed in Pasadena, Glendale, and Riverside. The exterior scenes of the Griswold's house were shot in Pasadena, while the scenes of the Griswold's shopping and driving around town were shot in Glendale and Riverside. Additionally, the exterior of the Wally World theme park was shot at the Warner Bros. Studios backlot.