This modern labyrinth lies in the shadow of a ruined medieval castle.

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.

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

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.

Eyam took steps to quarantine themselves and keep the plague from spreading.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

This small collection of rare books was uniquely locked up for safe keeping.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Follow the original medieval paths that wind through this intriguing section of the city.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

A reminder to choose water over wine since 1888.

Legend says this cave housed a 16th-century cannibal and his family of 48.

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

A century-old tradition has culminated in a small but singular collection of feline effigies.

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

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

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

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