Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

A Barbados crypt where it's said that the coffins refuse to stay put.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

The crypts are so large they're basically their own underground church.

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

One of its engravings is believed to be among the first representations of medical and surgical instruments.

The largest brick bridge in the world.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.

A historic scientific breakthrough that crosses nine borders.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

A 16th-century horror show built in a lovely Italian garden.

The wreckage still sits at the exact spot the plane crash-landed in 1945, carrying 1,000 pounds of explosives.

Rare collection of medieval books under lock and key.

Eighteen miniature death-scene dioramas.

The main gates have been locked since 1745 and will remain so until the Stuart Dynasty returns to the throne.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

A succinct inscription commemorates the ebb and flow of a woman's life.