This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

This sinister Baroque entryway could lead you to a terrible fate.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

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

A brutalist gem towering over the heart of Milan.

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

Third time's a charm, or in this case, two testicles are.

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

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

This small Milan street is filled with colorful homes and a rich history.

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

This sculpture of a rhinoceros suspended above a city square is meant to evoke the weight of the human condition.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

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

These elaborate gothic monuments honor Verona's medieval lords.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Pilgrimage site for star-crossed lovers.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

A haunting collection of sunken wooden barges litters this Italian river bend.

A cone-shaped top and cylindrical body set this 900-year-old structure apart from other Italian bell towers.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A public work of art that also provides some relief from the summer heat.