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

Three generations of intrepid collectors display their curious artifacts in a homemade museum right next to the caves they discovered.

Arcadia is home to a haven for nature geeks and 80s TV lovers alike.

This bizarre hotel on historic Route 66 has been plagued by rumors of paranormal activity.

A relic from a forgotten bakery chain still spins atop a diner.

San Diego's most historic and haunted home.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

This popular pilgrimage site offers a hole filled with holy healing dirt.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Home to New Mexico's longest bar, this watering hole also has a mining museum and a haunted history.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

This giant temperature attraction created some giant electric bills.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

This former lieutenant governor's home is brimming with curiosities.

This vintage animatronics show is the Vegas version of a walk through the woods.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

The wild west is still alive and well at this authentic mining town watering hole.

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

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.