Hell's Half Acre is a large scarp

Escarpment

An escarpment is a steep slope or long cliff that occurs from erosion or faulting and separates two relatively level areas of differing elevations.-Description and variants:...

 located about 40 miles (64.4 km) west of Casper, Wyoming

Casper, Wyoming

Casper is the county seat of Natrona County, Wyoming, United States.. Casper is the second-largest city in Wyoming , according to the 2010 census, with a population of 55,316...

 on US 20

U.S. Route 20

U.S. Route 20 is an east–west United States highway. As the "0" in its route number implies, US 20 is a coast-to-coast route. Spanning , it is the longest road in the United States, and the route sparsely parallels Interstate 90...

/26

U.S. Route 26

U.S. Route 26 is an east–west United States highway. It started in Ogallala, Nebraska, and gradually grew to reach the West Coast in Oregon. When the U.S. highway system was first defined, it was limited to Nebraska and Wyoming; by the 1950s, it continued into Idaho and Oregon. The...

. Encompassing 320 acres (1.3 km²), this geologic oddity is composed of deep ravines, caves, rock formations and hard-packed eroded earth. Hell's Half Acre was used as the location for the fictional planet of Klendathu

Klendathu

Klendathu is the fictional homeworld of the extraterrestrial race known as the Bugs , in the fictional universe of the Robert A...

 in the movie Starship Troopers

Starship Troopers (film)

Starship Troopers is a 1997 American military science fiction film, written by Edward Neumeier , directed by Paul Verhoeven, loosely adapted from Starship Troopers, a science fiction novel by Robert A. Heinlein. It is the only theatrically released film in the Starship Troopers franchise...

.

The location was known as "The Devil's Kitchen", "The Pits of Hades", and "The Baby Grand Canyon" until a cowhand appeared and thought he was at Hell's Half Acre, an area southwest of Casper full of alkali and bogs.

Native American tribes used the ravines to drive buffaloes to their death during their hunts.

As of December 2005, the roadside restaurant and motel/campground sitting atop the ravine were closed. The motel and the abandoned restaurant have since been torn down. The area is fenced off, but there is an interpretive sign west of the former restaurant.