A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This massive library holds what was once the largest book collection in the world.

The construction of a tram line unveiled hidden remnants of the old medieval city.

This massive blockhead sculpture hides an entire library.

Thousands of costumed dolls fill one of the world's creepiest museums.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

Remnants of cone-shaped fascist bomb shelters in Milan.

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

"The prettiest love letters in the world" ... or so said Lord Byron.

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

Da Vinci's equestrian statue, 500 years in the making.

This poignant art installation raises awareness of violence against women.

A brutalist gem towering over the heart of Milan.

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

Invented in the mid-19th century, this machine could send copied images via telegraph lines.

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

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

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.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

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

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.