This erect, phallic geological spire wasn't always named so domestically.

Population: 1.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

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

A multi-storied adobe complex has been inhabited for more than a thousand years.

A Wild West jailhouse that slid down the mountainside.

A mysterious "wedding cake" castle in the middle of the urban desert.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Visitors to this library are in for a real-world education in modernist architecture.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

An unrealized Taoist palace left abandoned in a Houston suburb.

A private collection of massive steel monsters guarding a Texas pipe works.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

The blinking light atop the iconic landmark has been sending secret messages for decades.

Booker T. Washington's home at the Tuskegee Institute was a gem of splendor.

Once one of the largest producers of pig iron in the world.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.