The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The highest bridge in America was built for an almost unnervingly small amount of money.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

A crumbling hospital from the 1850s on Roosevelt Island.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

One of few remaining antique carousels with stationary animals in the U.S.

Abandoned silver mine strewn with wrecked and twisted structures.

A 140-year-old castle with underground caves hidden in San Francisco.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

An abandoned concrete jungle surrounded by a lush park.

This recently restored timepiece has stood all around Kansas City.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

A piece of John the Baptist in the American heartland.

This giant green head remembers one of America's jazz giants.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.