Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

Red frames showcase remnants of one of New York's original subway stations.

An exhibition space dedicated to American outsider art created between the 18th and 21st centuries.

This secluded ruin was once a home for exotic plants.

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

A New York warehouse filled with an enormous amount of goods saved from the landfills and donated for creative use.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

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

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

The first piece of public art dedicated to LGBT rights.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

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

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

The 28-foot granite map plots the locations of 40 theaters in New York City.

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.

Believed by many to be the oldest surviving public monument in the United States.

The massive Roman arch in New Hampshire that was meant to be a tomb.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.