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.

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

This haunting stone chasm is a hotbed of mossy rock and English legend.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

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

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

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A fantastic castle rumored to be the birthplace of King Arthur.

The longest hedge maze in the world.

Famously misunderstood wonder of the ancient world

This South London cemetery holds the remains of more than 15,000 people.

The sign at the garden gate reads: "These Plants Can Kill."

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

You may recognize this beautiful grove within Kaitoke Regional Park as location of the house of Elrond.

Some of the clearest water anywhere in the world.

Tubing through a cave lit with glowworms is a magical underground experience.

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