If you can make it to Philadelphia I'd take in the New Jersey State Aquarium right across the Delaware in Camden, New Jersey. It's a nice aquarium, and there's plenty to do along the waterfront. HTH. Prof M

FTR. The New York Aquarium is the best of the three. I hope you have the time. Where else can you take in 3 Aquariums in 1/2 a days drive ?