One of the world's largest swinging bells is a symbol made from the melted aftermath of war.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

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

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

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A Milanese café entirely designed by the American director Wes Anderson.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

Venice's "Island of the Mad."

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

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

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

According to local folklore, this Roman sepulcher was once a throne for the Devil.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

2300-year-old Roman road connecting the empire.

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

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

A spooky spot along the road where things mysteriously seem to move uphill by themselves.

Check out engineering marvels of the past at this unintentionally retrofuturist museum.

A Romanian church built from one single oak.