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

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

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

The Ozarks' strangest dwelling.

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

This former mining town was named the most toxic town in America.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

This century-old roadside attraction is full of bizarre rock formations.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

An extravagant western hotel where every floor is the "ground floor."

Home to Hollywood history and a very special salt crystal.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.

A college in rural Kansas founded to prepare the country for an impending World War III.

These experimental weapons brought World War II to Nebraska as well as 26 other U.S. states.

European castle ruins in an American state park are actually the product of death and grief.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

Curious cave that stays a cool 56 degrees all year long.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

A brick-paved former section of the historic coast-to-coast highway.

This pristinely abandoned filling station on the edge of a graveyard is populated solely by unsettling mannequins.