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

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

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

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

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

A site of pagan worship which still attracts people looking for fairies.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

The fountain marks the area where hundreds of accused witches were burned at the stake.

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

A subterranean playground in an abandoned slate mine.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

A unique waterfall that some believe attracts the fairfolk.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

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.

Repository for more than 22 million pickled specimens.

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

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.