Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

During the holidays, a vintage subway train whisks New Yorkers back in time.

A hip bar decorated with walls of golden skulls.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

New York City's only radical feminist independent bookstore.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

A reminder to choose water over wine since 1888.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

A living archive of urban activism and space reclaimed.

A notorious punk house turned co-op.

One of the few surviving original NASCAR dirt-track speedways.

This graffitied 19th-century building was a prototype of European industrial architecture.

The eclectic home of a leading Turkish architect is a gorgeous piece of eye candy.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

1513 Turkish world map, full of European state secrets and snarky commentary.

The most metal church of all time was built in record time because of an international, pious pissing contest.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.