The vast, legendary catacombs hold secrets much stranger than stacked bones.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A bizarre house filled with an astounding array of collections.

The sign at the garden gate reads: "These Plants Can Kill."

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

France's most famous cemetery, with some of its most curious tombs.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The fairy tale castle of the "fairy-tale king."

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

These fantastically named natural pools look like something out of a Scottish myth.

A 140-year-old castle with underground caves hidden in San Francisco.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A snapshot of the city's fascinating voodoo culture.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

An eerie, derelict amusement park in Berlin.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.