Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

There has been an astronomical clock on this spot since the 14th century.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

This strange statue features a bust of the famous composer plopped atop a woman's body.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This bike path was sunk below water level for maximum wonder.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

The time thousands of bags of chips washed ashore in the Outer Banks is memorialized in a local museum.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.

This aluminum “stairway to heaven” has impaled at least a couple of birds.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

Home to the longest wooden escalators in the world.

These figures float and flutter in this fountain crafted by famed Swedish sculptor Carl Milles.

During World War II, blimps were a key part of the United States' defense against German U-boats—this building could house a dozen of the armed airships.

An allegorical statue of a giant pregnant woman representing justice and truth.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

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

This art installation pays homage to the famed stones of European lore.