This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A mythically themed self-built sculpture park.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

See what remains of a once grand ancient Roman circus.

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

Remnants of cone-shaped fascist bomb shelters in Milan.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

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

A brutalist gem towering over the heart of Milan.

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

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

This poignant art installation raises awareness of violence against women.

Vast network of air raid tunnels beneath Lombardy's capital.

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

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

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.

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

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

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

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

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

A tribute to the builder(s) of Bitcoin.