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

This sanguine boulevard was named after a deadly cowboy bar fight.

A motel dedicated to Southwestern nostalgia.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

One of the ghostly stops along Route 66.

The ghost town that ended up on Ebay.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

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

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A burnt-out motel with priceless Native American artwork in the basement, redeveloped into apartments.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

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

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

A Saint Nicholas-themed ghost town in the Mojave desert.

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.