Fortified medieval tower house with lovely roof garden.

On rare days, this abandoned castle's gatekeepers open its doors, revealing the eye-popping splendor hidden inside.

Renaissance villa and gardens complete with a tormented colossus.

Contains some of the world's more disturbing wax anatomical models.

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

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

Just saying the name of this town out loud is said to bring bad luck.

A ghostly mansion in the middle of downtown Tunis.

An Italian hillside ghost town.

Though an earthquake destroyed this village in 1980, one former resident still walks its streets every day.

Saint Borromeo often prayed in this austere crypt during the 16th century.

Built in the early 70s, the ruins of dinosaurs are all that remains of a man’s dream to build a free dinosaur themed mini golf course

These ruins reveal the remarkably intact layout of a Roman marketplace.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

An unassuming secret door once led to a legendary watering hole.

This 19th-century church was built for Sicilian immigrants, survived World War II, and today stands on a landfill.

To get to or from this Canadian ghost town, you'll need to cross 11 single-lane bridges.

This mysterious church sits discreetly above the Aude countryside, right in the heart of "Grail Country."

One of Europe's largest groups of dolmens remains largely off the typical tourist track.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The location where the iconic movie character declared it was time to go home.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.