A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A crumbling hospital from the 1850s on Roosevelt Island.

Storage warehouse of the rich and famous.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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

Little Red Lighthouse under the George Washington Bridge.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

The "Seinfeld" diner.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

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

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

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

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

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

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

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Read a book next to a Midtown waterfall.

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