A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Most-visited and most-photographed slot canyon in the American Southwest.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

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

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

A facility built in 1992 for an underground nuclear test remains in place today.

The grand marquee of this abandoned Hawaiian theater remembers the building's elegant past.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

Over time, this castle grew to encompass the entire island.

One of the largest wooden ships ever built is honored by a steel sculpture evoking her once-superlative scale.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

Nature's biggest mammal swims in landlocked Oklahoma.

This unusually circular centenarian barn became a Route 66 icon.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

This refurbished gas station is one of the oldest in Texas, located on the original Route 66.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

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