This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

A black cottonwood gets a second life as a home for books.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

The world's largest military aircraft cemetery.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Experience a charming 1930's version of "infotainment."

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

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

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

The world’s largest concentrated solar plant generates as many problems as megawatts.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

This giant temperature attraction created some giant electric bills.

A former utopian healing center created by a huckster and built by derelicts.

Decommissioned experimental solar facilities that pioneered solar energy technology.

One of the ghostly stops along Route 66.

A dry lake is what remains of a community founded on a real estate scam.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."