Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

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

A kitschy, creepy St. Louis mainstay.

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

This historic cliffside mansion uses a natural cave for air conditioning.

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

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

This is not your typical jungle gym.

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.

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

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

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

A prehistoric rock shelter that's literally in someone's backyard.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.