One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

England's most notorious suicide spot.

The Origin of On the Origin of Species.

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

A hands-off space for graffiti artists to hone and display their skills.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

This haunting stone chasm is a hotbed of mossy rock and English legend.

This crumbling folly looks like an enchanted left over from Middle Earth.

An open air haven for tropical monkeys in the damp moors of the English country.

A petite castle folly in the English countryside.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A motley, fantastical agglomeration of unlikely houseboats along the Shoreham-by-Sea riverbank.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

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

A magnificent Victorian garden that brings the charm and style of old-time aristocracy to the 21st century public.

Famously misunderstood wonder of the ancient world

Huge winged monument in the United Kingdom.

An abandoned 18th century manse looks like something out of an Indiana Jones movie.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.