Ruins of a 10th century church tucked away deep in a botanical garden.

A fairy tale castle in modern Rome.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Venice's "Island of the Mad."

This museum is home to 22 panes depicting skeletons dressed in colorful garments.

Statues portraying anatomical deformities were placed in this garden to foster ethical behavior.

A medieval fresco which reminds visitors that death will come for us all.

An eccentric artist's abode in this small Italian town has been transformed into a surreal temple of mosaic madness.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

A huge enchanting public park just outside the ancient walls of Rome.

Italian horror legend Dario Argento’s own shop hides a sinister museum-dungeon in the basement.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

The farm where one of America's most famous folk artists created her paintings.

A giant mascot, a car bomb, and the mafia mingle in the history of a defunct restaurant chain.

A peculiar family mausoleum built by a German nobleman captivated by the occult.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

The long-lost final resting place of an accused witch.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Visit a prison tower used during witch tribunals.

This oak sculpture at the edge of a small woodland is nine feet tall and shrouded in mystery.

Mysterious heaps of stones dot these otherworldly woods.

A ghostly mansion in the middle of downtown Tunis.