Hundreds of painted rocks dazzle this small beach where adding your own is encouraged.

Only known mainland rookery of the threatened Stellar sea lion.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

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

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

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

The red brick house where the father of rock 'n' roll wrote some of his classic hits.

Giant granite rocks standing end-to-end like a train of circus elephants.

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

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

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

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

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

This is not your typical jungle gym.

This mosaic-covered bar is brimming with curated curios.

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

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.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

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

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

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

What was once a summer home next to a waterfall has now become littered with graffiti and children in swimsuits.

The only remaining sod house Oklahoma built by a homesteader in 1894.