A black cat protests the City Guild in Riga's Old Town.

3,000 market stands in five former Zeppelin hangars.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

This slender three-story building has also had several famous residents.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This translucent sculpture represents a quintessential component of New York City's skyline.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

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

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

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

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

This poignant art installation raises awareness of violence against women.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Nestled in the heart of Milan is a real wunderkammer of morbid curiosities.

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

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.

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