Once a resting spot for King Fernando VII.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

Commonly acknowledged as the only public monument to the Devil himself.

This small museum tucked within a subway station holds pieces from Madrid's past.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."

An unsettling painting of three faceless sisters that is surrounded by history and legend.

This 18th-century dissection theater's frescoes display a gorgeous tension between the terrestrial and esoteric.

An ancient artistic garden parlor full of hidden water wonders.

Remnants of cone-shaped fascist bomb shelters in Milan.

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.

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

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

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

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

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

A brutalist gem towering over the heart of Milan.

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

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

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

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