The oldest residential street in Europe also features an optical illusion.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

A kaleidoscopic warehouse-maze of handmade neon signs.

Some of England's last cave dwellers lived and worked within this huge cave.

This nondescript building hides an entrance to an underground nuclear tunnel system.

A place of remembrance for the Prime Minister that met a violent end.

This ancient oak tree sheltered accused "witches" in the 17th century.

The UK's oldest theme park slowly slips away.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

An American ghost town hides along a side street in Scotland's capital.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

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

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

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

This skewed English house has looked like it's going to fall over for centuries.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

This antique prison is a tourist attraction with a sordid past.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

Fantastically decorated underground chambers built in the 1760s.