This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

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

The most confusing clock in New York.

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

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

The former hotel where Tesla invented the radio.

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

A popular European tradition makes its way to the states on one of America's most famous bridges.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

A men’s restroom became a sandwich shop.

A 19th-century horse lover's bequest led to the construction of this unique fountain in Chicago.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Illegal drag racing two stories beneath Chicago’s streets.