An alchemist's "magic door" stands in the middle of a Roman park.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Geothermal waterfalls in Tuscany.

A sunken idol welcomes parishioners to Davy Jones' Locker.

One of the largest caves in the world open to the public.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

The world's most active stratovolcano is almost always erupting.

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

The location of the last witch trials of Italy, known as "The Salem of Europe."

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The Pope’s secret escape route.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A musical instrument played by the sea.

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

142 ceramic steps become a mosaic once a year.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

Crushed coral and crystals give the sand its signature coloration.

Five candy-colored villages on the Italian Riviera.

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

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

The world's only museum devoted to the wonders of fluorescence.