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

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Stalactites and stalagmites in a beautifully lit cave.

Thousands of well-dressed mummies below a monastery.

A lover's walk between hilltop towns, decorated with graffiti love notes.

A collection of grotesques lines the walls of this Italian villa.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

What better way to honor a pioneering anatomist than by preserving his severed head like a specimen?

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

Venice's "Island of the Mad."

A sunken idol welcomes parishioners to Davy Jones' Locker.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

Italian cave with exceptional acoustics and an unsavory history.

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

Art and armour fill every inch of this rich kid's Italian villa.

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

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Host to the annual Festival of the Snakes.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

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