This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

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

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

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Sidney Scurvy, the interactive computer sailor, takes you on a journey to discover the everyday lives of Cook and his men.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

England's "pier at the end of the universe" unites astronomy and contemporary architecture.

A writer's tiny retreat built from salvaged shipwreck timbers.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

An octagonal folly tower overlooking the sea.

An 1814 castle that hosts an exhibit of "explorabilia".

This Scottish bridge seems to compel dogs to leap to their death.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

Legend says these rocks used to be hunting dogs, a story that may have inspired Sherlock Holmes' most famous case.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

During World War II, this rice mill became a Nazi concentration camp.

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.

A subterranean playground in an abandoned slate mine.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.