There is a whole society on the upper level of the Brooklyn Bridge.....who knew! I saw a model doing a fashion shoot, a bridal party getting their official photos taken, the real New Yorkers who live and work the city, and fabulous views.
It's not a hard walk, I have done it on three occasions. I highly recommend it on your next trip to Manhattan. My fellow travelers have always rated this little journey as the "most enjoyable" activity of all our sightseeing in New York.