Since that is what it's mostly used for, seriously.
Planes at 1,000 to 1100 feet, helicopters below with appropriate separation. Enter from George Washington Bridge, the other end would be the Statue of Liberty, to turn around and fly back to the bridge and exit.
No entering from the side, no transitting except in controlled airspace above, say, 1,200 feet.
This unique tourist attraction would be retained, and everybody should be happy. Like gazing into the Grand Canyon. Yes?
