Petroglyphs in the Boulder City Dry Fall Area. The exact location is unknown, but the location is possibly in Keyhole Canyon. Petroglyphs are pictogram and logogram images created by removing part of a rock surface by incising, picking, carving, or abrading. Outside North America, scholars often use terms such as "carving", "engraving", or other descriptions of the technique to refer to such images. Petroglyphs are found world-wide, and are often associated with prehistoric peoples. The word comes from the Greek words petro-, theme of the word "petra" meaning "stone", and glyphein meaning "to carve", and was originally coined in French as pétroglyphe. The term petroglyph should not be confused with petrograph, which is an image drawn or painted on a rock face. Both types of image belong to the wider and more general category of rock art or parietal art. Petroforms, or patterns and shapes made by many large rocks and boulders over the ground, are also quite different. Inukshuks are also uni

Two men near a train in Boulder City, Nevada while the train is hauling construction vehicles to be used for the Hoover Dam. Site Name: Hoover Dam (dam)

A picture of the North Las Vegas City Hall and Police Station. The new city hall building was being built in 1965-1966.

The black and white view of Howard Hughes plane in flight over New York City, July 1938

The presumed view of a gas station in Boulder City, Nevada. Transcribed onto the large sign above the gas pumps: "Standard Oil Products."