Local legends say that fairies used to dance in the moonlight here and invite handsome young men into their grottoes.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

Cliffs full of fossils at the portal to England's Jurassic Coast.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

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

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

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

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

One of Europe's oldest libraries.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

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

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

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

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

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

Stonehenge has nothing on Castlerigg’s views.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.