The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

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

An urban forest overtakes what was the greatest failure of utopic urban housing.

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

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

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

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

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

The world's largest man-made underground caverns offer unparalleled underwater wonders.

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

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.

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

The oldest house in Lindsborg, Kansas, includes some fascinating inscriptions.

This massive marble memorial was built bit by bit either out of devotion or spite, but at the expense of the surrounding town.

Tribute to the famous Notre Dame football coach who died in a plane crash.

The holiday spirit lingers year-round in the "Christmas City of the High Plains."

A statue high in a hill that represents how Buffalo Bill got his name.

A tiny racehorse graveyard in the middle of a quiet Kansas City suburb.

This sacred space and gathering spot for the Wyandot Nation has been the surrounded by controversy and confusion.

This Wild West attraction is probably more fiction than history, but that doesn't mean it's not awesome.

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

The United States's largest hand-dug well is topped with a state-of-the-art museum.

Stories of sightless fish and ghostly cowboys are only a fraction of the legends surrounding this Kansas sinkhole.