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

The deepest spring in Missouri.

In the loving memory of a tragically deceased role-player this Illinois park is decked out with both dungeons and dragons.

These pink granite water slides are the result of millions of years of erosion.

Buy a token from the liquor store and you can make this beast spew flames on command.

Nestled in Onondaga State Park, over 100 canoes carefully stacked in a replica of the famous standing stones.

This "little gallery in the middle of nowhere" is housed in a 170-year-old horse barn in the Missouri Ozarks.

Some of the oldest exposed rock formations in the United States.

Rusted and decayed, this former mining site is a portal to the past.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

A museum dedicated to man's boldest venture.

This lagomorph-obsessed Route 66 emporium is home to a giant jackrabbit that sits in a bunny graveyard.

In a historic steel foundry east of the Mississippi River, thousands of wooden crates hold the architectural remnants of buildings long gone but not forgotten.

An abandoned factory along the Mississippi coated by a giant mural.

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

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

A wax effigy of St. Valentine hides one of the saint's relics.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

The largest known meteorite on Earth was too big to move.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.