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

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

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

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

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

This former crime corner has been turned into an eclectic community center.

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

The mummified relics of an American missionary.

The most confusing clock in New York.

Salute the leader of the proletariat.

A Manhattan Episcopal church with an eerie underground crypt.

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

Phil Mortillaro uses keys to bring art back to the Village.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

Little Red Lighthouse under the George Washington Bridge.

Rummage through this sunken ship, but leave your scuba gear at home.

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

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Relics given to a Manhattan church to avoid seizure by the Italian government.

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

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

Visit the monolithic tomb of America's most famous general.

An artist's cute bronze subway sculptures belie his violent artistic past.