Mysterious rocks that ring musically when struck.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Outsider art meets paleontology at this roadside reptile repository.

A spoke-tacular artwork constructed from recycled bicycle rims.

Follow the steps, and this roadside artwork will teach you how to dance.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

Largest pre-Lent festival in the Dominican Republic.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

These mysterious religious carvings were once thought to be thousands of years old but are actually the work of modern eccentric.

Scotland still bears an enormous scar of its Roman past.

These semi-natural waterfalls hint at the park's Victorian-era industrial past.

A leafy, peaceful oasis nestled in the heart of Glasgow's busy south side.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.