These ancient sacred grounds granted amnesty to those who managed to reach them.

This black shoreline is made up of exploded lava particles.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

Roadside collection of 65,000 signs.

A tunnel with windows, so you don't miss out on the impressive views.

This Native American settlement dates back to the Pueblo II period.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancient pueblos built into the base of a natural canyon wall.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A motel dedicated to Southwestern nostalgia.

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

A clear blue swimming hole with hidden caves, still unexplored.

Is this 47.7-mile stretch of highway the longest straight road in the United States?

The highest point in Oklahoma used to be a lawless outlaw's paradise.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.