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

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

One of the largest, oldest, darkest, quietest motel rooms in the world.

An homage to everyone's favorite prehistoric cartoon family.

Don't blink or you'll miss it.

The remains of a boarding school designed to forcibly assimilate Native American children.

This golf ball–shaped former desert real estate office now houses a UFO museum.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

An eclectic treasure trove of maritime marvels.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

This sign designates the road that leads to the infamous Area 51.

The location where the iconic movie character declared it was time to go home.

Most famous work of one of Frank Lloyd Wright's sons.

Tijuana's legendary jai alai or "basque ball" palace is now a massive music venue.

Historic funicular railway, believed to be the shortest railroad in the world.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

One of the holiest places in the region, devotees come to Tirta Empul to bathe in the holy spring water.

The famous blue house from the classic horror film "Halloween" is now a local landmark.