On the side of Arkansas' Great River Road stand the remains of a forgotten World War II POW Camp.

The Man In Black grew up in a large agrarian community established by the federal government in the Great Depression.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

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

One of the most acclaimed eateries in Arkansas is a two-table diner on the ground floor of a family home.

The largest spring in Northwest Arkansas is also home to a sprawling botanical gardens and a historically significant bluff.

This mountaintop refuge rehabilitates tigers, lions, bears, and more from illicit wildlife trade—and offers overnight lodging.

This restaurant serves wood-fired fare served in a natural cave with a live spring.

This century-old roadside attraction is full of bizarre rock formations.

The Ozarks' strangest dwelling.

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

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

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

A church of bones, decorated with 40,000 human skeletons.

A monument to the bloody fight against fascism in Slovakia during World War II.

This region of Slovakia boasts some of the most plentiful opal mines in the world.

After 11 years of reconstruction work, Slovakia's finest hilltop chapel complex is finally reopen to the public.

An unusual cave filled with rare alien-looking aragonite formations.

A perfectly preserved hill village where the buildings are painted like white lace.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

Vermont's hills are alive with the sound of music at this historic hotel.