Reasons to {heart} New York!

Did you know that the street signs of Manhattan can teach you some interesting things?

You will find BLACK street signs in lower Manhattan,
 as this means: streets that were here before the American Revolution.
 (and since Manhattan was populated from this area up, 
you will only find black street signs in this area of the island)

Other Manhattan street signs are:

GREEN - Regular, Permanent
BLUE - They use it to honor something or someone.
REDDISH BROWN - Historical