400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

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 historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

This historic theater's pipe organ still accompanies silent films just like it did in 1929.

A notorious Route 66 eatery once frequented by Al Capone.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

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

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Hundreds of trees made from glass bottles make up this forest on Route 66.

One of the ghostly stops along Route 66.

When you can afford only half a road, you build only half a road.

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

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

Nature's biggest mammal swims in landlocked Oklahoma.

It reportedly took three years to sort through all the objects in this eclectic lifelong collection.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

A piece of outsider public art accompanied by a strange urban legend.

A museum befitting the city responsible for supplying the majority of the world's LSD.

World's largest carved onyx figure stands as a tribute to enduring peace.