Museum about life, death, and cannibalism in the Stone Age.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A unique waterfall that some believe attracts the fairfolk.

This tangled English forest looks like something right out of a fairytale.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

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

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

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

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

This crumbling folly looks like an enchanted left over from Middle Earth.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

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

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

Northern Ireland's Brobdingnagian stepping stones.

This ancient bridge made of stone slabs is said to be reserved for the devil to sunbathe.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.