An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

This spectacular track has run continuously since 1882.

A riverside tiny house with books and other treasures galore.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

It's safe—and permitted—to walk across these twin natural sandstone arches.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Legends surround this jagged rock formation in the New Mexico desert.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.