This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

Two gushing waterfalls of hot spring water within a block of each other.

Once the smallest park in the national system.

A quirky mishmash of Route 66 memorabilia and other throwbacks from the past.

This unusually circular centenarian barn became a Route 66 icon.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

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

Named for the 39 tribes that live in Oklahoma, this restaurant's menu deliciously highlights local flavors.

The largest single-building tribal cultural center in the U.S. is an expansive museum in Oklahoma City.

This giant mimetic milk bottle has encouraged Route 66 travelers to choose dairy since 1948.

An indoor botanical garden for tropical plants looks like a giant cylinder lying on its side.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

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

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

Not your typical pet cemetery.

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

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

The railroad turning train travel into a cinematic, highly immersive experience has a fascinating connection to Game of Thrones.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

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

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This balancing rock is one of Utah's most unusual geological formations.