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.

This is not your typical jungle gym.

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

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

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

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

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

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.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

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

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

San Antonio's first 3-D stereoscopic mural is a trippy treat for the eyes.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A 131-year-old wunderkammer of Texas history.

This eclectic Austin curiosity shop is home to all things strange and unusual.

It specializes in outsider art and artifacts of secret societies.

A health museum containing a 27’’½-foot intestine.

A view-altering observatory at the University of Texas.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

At the "Garage Mahal" in Houston, car culture is about more than just driving.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

The summer home of the largest colony of bats in the world.