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

The mummified relics of an American missionary.

An annual extravaganza of Broadway theater memorabilia.

There must be a pun in this haystack somewhere...

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

The most confusing clock in New York.

Commemorating the spot where the famous scientist fed his pigeons.

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

Cryptic messages embedded in the New York City sidewalk.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A celebration of capitalism in Midtown.

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

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

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.

One of only two commuter aerial tramways in the United States.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

Tucked in the back of this amazing antique store is an important piece of medical history.

This working class sculpture pounds his hammer all the livelong day.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.