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

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

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

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Go inside to really appreciate this 500-year-old technological masterpiece.

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.

An Italian hillside ghost town.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

2300-year-old Roman road connecting the empire.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Geothermal waterfalls in Tuscany.

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

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

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

A walk through the historic city center, under the streets of Seattle.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.