A 40,000 sq. ft. plot that is zoned to accommodate a 320,000 sq. ft. of residential development at 41-50 24th Street, which has been an empty dustbowl for as long as I can remember. Well it recently traded hands again (after the previous owner sat on it for 4 years, the owner before that for 5) and its current sell-price values the potential build-out (not including the actual cost of building, just the land) at $90/sq. ft. Yup. $90 for a square foot of that dirt and 8 stories of air rights. You can do the math or click here to read the original article and find out. Seriously, the only way to get rich in NYC is to already be rich, it would seem.