When you think about Wyoming movies, old westerns typically come to mind.

While the Cowboy State has inspired many tales of rugged, frontier justice, it’s also been the setting for some terrifying science fiction thrillers and horror films.

Here’s our list of the five scariest movies ever set in, filmed in, or inspired by Wyoming.

1.  Close Encounters of the Third Kind – Arguably the greatest movie ever filmed in Wyoming, this epic Steven Spielberg production famously features the Devil’s Tower National Monument as the backdrop for a frightening tale of alien abduction.

2. Natural Born Killers – This 1994 Oliver Stone film depicts two young lovers who embark on a cross-country killing spree. It was inspired by a real-life couple captured here in Wyoming.

In 1958, Charles Starkweather and his 13-year-old girlfriend Caril Ann Fugate killed eleven people across the state of Nebraska, including Fugate’s mother, stepfather and sister. They were eventually captured in Douglas, Wyoming, before being extradited to Nebraska and tried on murder charges.

The story also inspired two other films, The Sadist and Badlands.

3. Prison – Filmed at the old Frontier Prison in Rawlins, this 1987 horror flick follows an inmate who was executed for a crime he did not commit. Years after his death, the inmate comes back to life and slaughters the men responsible for his execution.

The movie also featured several area residents as extras along with the actual gas chamber from the old prison.

4.  Endangered Species – This 1982 movie, filmed in Buffalo, starred Robert Urich as a New York cop investigating a series of cattle mutilations in the west.

5. The Vanishing – Kiefer Sutherland starred in this 1993 thriller about a man searching for his recently abducted girlfriend, played by Sandra Bullock. After identifying the kidnapper, Sutherland sets out in search of his lost love in Wyoming.

Honorable Mention - Starship Troopers – This campy 1997 sci-fi farce was filmed at Hell’s Half Acre. Although it's not very scary, the giant insects from the planet Klendathu do look creepy in front of the rugged Wyoming backdrop.