London's old-school healing garden.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

Traveling collection of amazing automata.

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

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

Banksy gives themself artistic license with this piece of London street art.

A village on the east coast of England that has almost completely eroded into the North Sea.

A genuine Little Shop of Horrors.

A petite castle folly in the English countryside.

This series of Scottish caves has no clear purpose other than baffling historians.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

A student driver's nightmare.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

Fantastically decorated underground chambers built in the 1760s.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A pub that is literally in the middle of nowhere, but continues to do business.

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.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

This tangled English forest looks like something right out of a fairytale.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

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