Revealing mistake: In the film's first scene, as Clark and Russ Griswold make a left hand turn to pull into the used car lot in Chicago, the upper quarter of the screen shows mountains and palm trees in the background, which is an impossibility for Chicago. I believe the nearest mountain range to Chicago is in Arkansas and the nearest palm trees reside in Louisiana. (This scene was filmed in California, which explains the mountains and palm trees, BUT nonetheless a mistake.)
National Lampoon's Vacation (1983)
Plot summary
Directed by: Harold Ramis
Starring: Eugene Levy, Chevy Chase, John Candy, Randy Quaid, Anthony Michael Hall, Beverly D'Angelo, Jane Krakowski, Eddie Bracken, Christie Brinkley, Imogene Coca
Clark Griswald has planned a vacation with his family to wally world, but unfortunatly his trip does not go to plan and the trip has a few hilarious problems on the way.
More mistakes in National Lampoon's Vacation
Cousin Vicki: I'm going steady, and I French kiss.
Audrey Griswold: So? Everybody does that.
Cousin Vicki: Yeah, but Daddy says I'm the best at it.
Trivia: Not a mistake but a "before they were famous": little cousin Vicky with the blonde hair is Elaine on Ally McBeal (Jane Krakowski).
Question: I've always found it odd that although Wallyworld is closed, the car park is still open and accessible. Is this normal for closed US parks, or could it be considered a goof?
Chosen answer: The parking lot is huge. There's really not any way to close the lot itself, but even if there were gates, Clark would probably have been oblivious to them by then.