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.

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

The giant skeleton sculpture is surprisingly well-traveled.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

Berlin's old airport.

Where once there was a train station bathroom, there is now this German burger joint.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

An old department store turned Nazi prison turned artist commune.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Macabre astrological automaton clock dating to the late 1400s.