An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

An homage to everyone's favorite prehistoric cartoon family.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A reproduction of earth's many biomes.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A self-built castle made by a mysterious man.

Rippling sand dunes frozen in the Arizona rock.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

The only diamond mine in the world where you can keep what you find.

A 70-foot replica of the famed Eiffel Tower.

A fictional Coupe DeVille built by hand and gifted to the Man in Black himself.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

This homegrown adoption center offers a wonderland of feline companionship.

Dinosaurs invade a suburban Nashville neighborhood.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.

Elvis's own personal tropical hideaway.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

The first full-scale tunnel built in America is short but scenic.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Mile-long cave system near Great Smoky Mountains.