This enchanting Victorian estate was home to the world's first hydroelectric power generator.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

This 13th century castle is chock full of ghosts and impossibly rare cows.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

These planks were originally installed to hold the dead.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A winding medieval path was used by mourners to carry their dead to the nearest church.

England's largest white horse isn't even white.

A stretch of land where the sour-sweet vegetable is cloaked in darkness and grows so fast you can hear it crack, squeak, and pop.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Once the home of a hermetic monk, this cave now houses a small church.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.