In a grove of fast growing walnut trees outside Paris, Illinois, a marker shares the story of a fictional road building culture.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

This shop is named for a runaway elephant who smashed through its doors, stole some peanuts, and spent five days on the lam.

Nature and art meet in this curvy creation

Tombstones carved to look like tree trunks are used for multiple generations of family members.

This mysterious hill seems to pull objects uphill.

Patrick Dougherty's fantastic living tree sculptures, mind-blowing but temporary.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

A wartime promise becomes a shrine to Our Lady of Lourdes.

The carved remains of a 200-year-old oak tree memorialize the namesake of the iconic "Wizard of Oz" character.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.

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

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

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

A big museum full of little worlds.

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

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

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

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

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

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

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

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.