This once rural mansion now sits in the heart of the city.

An open-air museum in a mountain valley features works designed to blend in with—and disintegrate back into—their natural surroundings.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

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

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

A larger-than-life house of cards stands outside the house of a former fashion designer.

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

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

Remnants of cone-shaped fascist bomb shelters in Milan.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

A stairway to heaven, or to nowhere at all.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

An obelisk commemorating Lincoln's role in connecting the coasts.

These experimental weapons brought World War II to Nebraska as well as 26 other U.S. states.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

A geological mystery on Camelback Mountain.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The same security that protects our nukes accidentally protected a gentle herd of antelope.

This erect, phallic geological spire wasn't always named so domestically.