A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

The celebrated eyesore created by starry-eyed sweethearts.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A surrealist timepiece by the artist of melting clocks.

Statue of death tucked in the University of Medicine courtyard.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

This South London cemetery holds the remains of more than 15,000 people.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

One of the world's largest collections of pathological specimens.

This one has sailed five times as far as Sir Francis Drake's famous ship.

An incarceration museum on the spot of possibly the oldest prison in England.

A friendly pub with a sordid past in cock fighting.

Hear the quietest sound from across the dome.

Public access to clean drinking water was an instant hit among the masses.

Dictionary Johnson’s favorite feline.