This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

This doorless 20th-century elevator doesn't stop or slow down.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A modern, secular take on a traditional Virgin Mary motif.

These unique stained glass windows were designed by local children using a modern flair.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

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

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

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

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

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

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

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