The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

A winding medieval path was used by mourners to carry their dead to the nearest church.

An abandoned World War II tank left to rust in the downland.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

The site of the first "historically true" UFO encounter in the U.S.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

There’s a hidden military meme engraved on the World War II Memorial.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

This overlooked museum houses an amazing collection of rare, antique typewriters.

The weathered grave of a medieval anchoress who walled herself up in a cell attached to a church.

Haunting graffiti left by prisoners of the Spanish Inquisition.

One man's quest for the ultimate road trip vehicle.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

A mysterious echo seems to defy the laws of acoustics.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

A stone in Wolin, Poland, marks the possible location of a legendary Viking fortress.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

There are two dozen tanks just sitting in an open field in Lower Saxony.

A retrofuturistic art installation in the Pittsburgh Airport.

One person's lost luggage is another person's treasure.

This precariously balanced boulder is said to be a hunk of stolen butter dropped by the gods.