Odd outsider art installations surround a Gold Rush-era ghost town.

The largest collection of historical roller skates in the world.

A small Montana town commemorates the dog who waited at the train station every day for his owner to return.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

The only road through the heart of Glacier National Park.

See the computer’s history revealed over the course of 20,000 years.

An entire town preserved as a historic landmark.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

Mining town from the late 1890s, once home to Calamity Jane.

This amazingly preserved Gold Rush town is a historian's dream.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

An abandoned factory along the Mississippi coated by a giant mural.

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

Another in a long tradition of legends regarding infernal seats.

A mysterious light of unknown origin on the backroads of Missouri.

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

This historic cliffside mansion uses a natural cave for air conditioning.

This abandoned prison castle has become an imposing gallery of graffiti art.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

The simple gravesite of a Romany clan leader is dotted with offerings, including cans of her favorite drink, Crush orange soda.