The bomb-ravaged remains of of a colossal Neptune.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

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

The giant skeleton sculpture is surprisingly well-traveled.

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

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

A once-luxurious, now abandoned hotel in the Italian Alps.

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

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Bell tower juts out from a village buried under a lake.

The secret medieval communication system will whisk your words above the noise of the crowd.

This half-finished "city of toys" was almost Italy's own Las Vegas.

Drink wine handed out through a window as part of an age-old tradition.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

Romans built the world's tallest artificial waterfall in 271 BC.

This abandoned Brutalist treehouse is a hidden architectural relic.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.