Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

Every inch of this chapel is covered in craftsmanship from across the world.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Model Trains and Much More in Hamburg.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

A domed disco abandoned since the '70s now attracts artists and explorers under its unique roof.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.