This mysterious marker puzzles pedestrians and infuriates geographers.

Holding the most bodies of any cemetery in the United States.

One of the first major shipyards in Brooklyn.

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.

Ornate "Renaissance Revival" style building.

Constructed in the 1920s, this former pencil factory is now an office building.

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

The return of something once considered a basic part of life.

2 square block factory in Greenpoint erected in 1936.

A way to take your secrets to someone else's grave.

One of only two remaining Victorian-era greenhouses in New York.

The painter who popularized "bulls" and "bears" as symbols for the stock market didn't get a proper headstone for over a century.

Final resting place of the immigrant who brought artificial seltzer water to America.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

A heartbreaking monument showing the last morning in the life of Jane Griffith.

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.

This controversial statue has migrated twice in its life.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Unrepaired walls from a 1920 anarchist bomb attack.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

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