I noticed this sign up in Marshak Hall at City College:
Although it's a pretty good Photoshop, it's pretty silly. Even if we disregard the overly green trees, evenly carpeting the NJ side of the Hudson River (even the sheer cliffs of the Palisades).
You see, lower Manhattan is mostly landfill:
If man didn't affect the island, it would look drastically different than just covered with trees.