Black Hubba is one of the most common New York spots that you see in skate videos. The ledge is about two-and-a-half feet high and descends down a six stair. It is made out of rounded marble (i.e. smith grinds and crooked grinds are very dangerous, if not impossible) and not completely chunked up. The runway will require a curve in, but it is not the sort of spot that requires tons of speed.
Otherwise, there are sets of two, three, four, five and six in the plaza, all of which can be skated up one set and down another. There are a couple of grates, curbs and curb cuts sprinkled throughout as well.
Bust — ♦♦ / Occasional: You typically will not get kicked out of here unless you are very unlucky.
Location: Lafayette Street and Duane Street, directly between the Federal Building and the State Supreme Court House. Take the 4, 5, 6, J or Z to City Hall–Brooklyn Bridge and skate north on Park Row until it turns into Lafayette Street.
Pictures (Click to Enlarge):