When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

Where Venice's gondolas go for a tune-up.

These pools have been abandoned for over 20 years.

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

This Italian pyramid is said to hold the mingled remains of the dead from both sides of the Battle of Novara.

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

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

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

People have been living in the cave houses on this Italian hillside since the Neolithic era.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

A madman's personal garden filled with 1,000 sculpted heads.

Crumbling ruins of the thermal baths that once attracted royals and aristocrats from throughout Europe.

Geometry and mystery come together in an epic show of octagonal masonry.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

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

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

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

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Walk through a fairytale in Tuscany.

This picturesque Umbrian city has a subterranean side that has long remained hidden.