A collection dedicated to the treatment of disease, held in London's oldest hospital.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A cluttered and astounding collection of antiquities and curiosities.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

One part local history, 99 parts gruesome haunted house.

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

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

An enchanting landscape of ancient sandstone structures eroded into otherworldly shapes.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

An archeological treasure trove stumbled upon by a couple of children.

A somewhat mysterious biomedical museum housed inside a Spanish university.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.