A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

Village situated on a narrow volcanic escarpment.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

Da Vinci's equestrian statue, 500 years in the making.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

Venice's "Island of the Mad."

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

This ultra-modern burial building would have stacked the dead like a giant filing cabinet.

This military mausoleum captures the solemn grandeur that most memorials only aspire to.

This Italian foot path winds through the mountains via 52 individual tunnels.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

Vast network of air raid tunnels beneath Lombardy's capital.

The mark of the Devil's horns on a marble column in Milan.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

An ancient artistic garden parlor full of hidden water wonders.

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

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

For hundreds of years, this huge figure has been blessing visitors before they explore his body.

This abandoned airplane hanger is said to have once been a top secret launch facility.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

These Stalin-era industrial 'death traps' hang lifeless above the city

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.