Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

According to legend, this tomb holds the secrets to time travel.

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

England's largest white horse isn't even white.

The remains of the concrete ship can be seen during low tide.

A dramatic sculpture high up in Yorkshire with vistas on an industrial scale.

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

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

WWII artifacts, including the building itself.

A deserted medieval village where bodies were once mutilated to prevent them rising from the dead.

Britain's tallest megalith towers over the cemetery of a quiet English village.

The remains of a remote village that once housed over 1,200 dam workers and their families.

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

A modern English garden of eccentric beasts, follies, and oddities.

The only surviving leech house in the United Kingdom was a home for bloodsucking worms until the 1900s.

A small waterfall tucked away in the forest of Harmby Gill.

A 550-square-meter micro-nation off the coast of Britain.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

One English town's celebratory landmark spurred more trouble than anticipated.

One of England's most famous churches hides a pair of little known architectural treasures.

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

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.