Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

One of the world's earliest skyscrapers.

A memorial to the firefighters who died in an industrial disaster is housed in a small public park.

An errant donkey ushered in a new era of mining in Nevada.

An enormous illuminated figure dances on the Las Vegas strip.

The remains of a boarding school designed to forcibly assimilate Native American children.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

This conservation area is also home to many of the region's desert tortoises.

A natural dome made of volcanic glass in Inyo National Forest.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

Decommissioned experimental solar facilities that pioneered solar energy technology.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.

One of the ghostly stops along Route 66.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Don't blink or you'll miss it.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.