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

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

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

The final resting place to 300 Victorian-era pets hides inside the city park.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

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

These ancient sea caves hold Britain's highest concentration of Pictish rock carvings.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

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

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Local lore says two enemy dragons live within these breathtaking mountain lakes.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

A spectacular cave and a beguiling lake.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

The hallucinogenic center of the ancient world.

At 1,732 feet above sea level, this spectacularly isolated yet surprisingly bustling bar is the highest pub in Britain.

This Manchester laundromat is hiding something.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.