Just how long of a walk is it over the Brooklyn Bridge to Grimaldi's? I see a lot of people suggest taking a cab there then walking back. I'm assuming this is because the walk back is more interesting because of the view of Manhattan, or is it because it's a really long hike? Would it be more fun for my niece and I to take a water taxi there, and if so do they drop you off very close to the pizza place? I missed all this area the first time I was in NYC, so I definitely want to do it this time. Thanks all!