The oldest U.S. Government building in California, and it's State Historic Landmark #1.

The first safe in this California town had to hold all the gold.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This deceiving white sand beach gets its brilliant hue from the chemical discharge of a nearby factory.

The former home of an Italian artist is now a shrine to his ambitious works.

Massive galleon from a box-office bomb docked in Genoa.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

The only museum with its curator—and her pets—buried inside.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

A medieval fresco which reminds visitors that death will come for us all.

Every inch of this chapel is covered in craftsmanship from across the world.

Gods clash with machines in a power plant regenerated as a museum.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

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

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

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

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.

The mark of the Devil's horns on a marble column in Milan.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.