Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Where Nor'easters go to die.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Jurassic Park—A Still Life.

This decommissioned DC-3 now forever points into the oncoming wind.

Abandoned silver mine strewn with wrecked and twisted structures.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

A military museum and library dedicated to the citizen soldier.

An enormous, inside-out glass globe built in 1935.

A collection of objects supposedly singed by the hands of souls in purgatory.

The mark of the Devil's horns on a marble column in Milan.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Bermuda triangle lighthouse, site of mysterious disappearances, left to crumble into the Atlantic.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A mysterious artist-run cabinet of curiosities and library.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Statue of a decomposing prince that once held his heart in its hand.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

The natural mummy of the less than chivalrous Knight Kahlbutz.