A faded reminder of what was once a common sight in London during the Blitz.

Perhaps the only prehistoric monument with its very own public bus stop.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

Abandoned boats decaying in the largest ship graveyard in mainland Britain.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

The secret wartime bunker built on the platforms of an abandoned Tube station.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

A house of bones — but nobody is quite sure to whom they belong.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

Where condemned pirates met their grisly end at the gallows on the River Thames.

A 200-year-old prison that now houses a peculiar crime museum.

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

A open air theatre built on a cliff by an eccentric British woman.

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

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

A Roman spa buried deep beneath the City of London.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.