The mysterious 855-foot zigzagging stone wall has been baffling people for centuries.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

These quintessentially English stepping stones were built for Victorian tourists.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

This creepy, abandoned cemetery is all that remains of a once booming mining town.

Site of the first hot air balloon flight conducted by the first English balloonist.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

A plaque marks the humble origins of an artistic muse who embodied the ideals of Pre-Raphaelite beauty.

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

A mysterious bridge over a sunken Roman road.

This tomb was fashioned with a sliding window for a grieving mother who struggled with her daughter's death.

Tucked away on a hilltop in the backwoods of Mississippi lies the remains of a blues legend.

Whimsical bronze sculptures of smiling coins and houses await visitors to this park.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

The world's oldest optical museum is an odd collection where the exhibits look at you.

This peaceful garden is hidden on the grounds of a spiritual organization founded by a pioneer yogi.

Climb down into the largest sinkhole in Qatar.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

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

Rare recess caves fill this unbelievably beautiful Ohio park.

This extraordinary geological oddity resembles human-made pavement.

This monument commemorates the only American soldiers to have directly fought Russians during World War I.