This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

A posh members-only club with a literally dramatic history.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

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

The most confusing clock in New York.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

A modern zoetrope on the New York City subway.

The site of the deadly Triangle Shirtwaist Factory Fire.

A way to take your secrets to someone else's grave.

Salute the leader of the proletariat.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

This innocent-looking townhome is actually a subway exit.

A bit of retro transportation flair preserved in the world's largest department store.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Sniff the Titan Arum's rotting flesh.