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.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

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

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

England's most notorious suicide spot.

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

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

Surreal riveted sea forts once protected the Kent shores from German attack.

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

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Monasteries on rock pillars, once accessible only by frayed ropes.

An alien landscape of chalk-rock in the Egyptian desert.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The largest stone moai on Rapa Nui.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

The atmospheric road was never meant to be so creepy.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

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

The heads of two giant mythological water horses honor Scotland's horselord past.