This 135-year-old weather station studied the effects of the climate on human health.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Where the lovelorn find a home for their sentimental keepsakes.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

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

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

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.

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

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

See what remains of a once grand ancient Roman circus.

The enigmatic sculpture hides above an escalator in a Milan metro station.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

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

A brutalist gem towering over the heart of Milan.

This iconic water tower and failed bandstand is open for panoramic views once a year.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This museum explores the grim reality of life in the earliest British colonies in America.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A downtown park built on top of unclaimed graves.