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

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

A museum dedicated to man's boldest venture.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

A kitschy, creepy St. Louis mainstay.

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

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

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Erosion and time have created a naturally-formed water park.

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.

Less a museum than a bizarre fantasy world created by artists and engineers.

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

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

This quaint museum lets you take a ride on its antique carousels.

Topeka has its own great wall, and it's covered in colorful images from the city's history.