This medieval city gate is now a blend of the past and the modern world.

One of Jeff Koons’s largest sculptures and his first commemorative work.

Check out engineering marvels of the past at this unintentionally retrofuturist museum.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

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

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

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

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

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

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

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

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

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

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

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

The secret medieval communication system will whisk your words above the noise of the crowd.

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

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

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

In an area known in Bratislava’s postal history, this sculpture sits equipped with a functional postbox.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

Celebrating the Swedish ship used in the first Arctic expedition to navigate through the Northeast Passage.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.