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

Historical figures from New York City's Catholic community reside in Midtown.

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

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

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

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

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

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

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

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

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

A waterway covered over after the Industrial Revolution has been unearthed and cleaned up, for the enjoyment of fish and humans alike.

A beautiful, historic location open to the public.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Self-sufficient greenhouse floating on the Hudson River.

This mass grave for victims of a massive hurricane remained hidden until 1991.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.