Enormous one time fiber mill now houses local artists and small businesses.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Built as a home for the Union Porcelain magnate in 1867, now the Greenpoint Reformed Church and home to a ceramic mystery.

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

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Two mermen, eternally spitting into each other's mouths.

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

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

A hamlet full of permanent Christmas spirit holds one of the earliest theme parks in the United States.

All that remains of the once-booming chain is a single orange-roofed restaurant.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

2,000 barrels of aging beer hidden in a warehouse at the Brooklyn Navy Yard.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

The home of the first American-born saint is one of the only curved buildings in New York.

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

Spike Lee's provocative film is officially honored right where it was made, the first time a work of art was used as a secondary street name.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.