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

Abandoned railway line circling the city of Paris.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

The monster at the center of the Darwin Center Spirit Collection.

The world's only museum devoted to the wonders of fluorescence.

Charles Babbage's proto-computer, painstakingly brought to life.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

This psychedelic tourist trap is a leisurely descent into madness.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

A student driver's nightmare.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A 200-year-old prison that now houses a peculiar crime museum.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.