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

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

An extraordinary mixture of natural beauty and man-made phenomena.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This woodland architectural installation acts as a camera obscura for the heavens.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

This geothermal hot spring hides beneath a slowly growing mineral dome.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The world's longest known cave system.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.