Just a short drive from NY, NJ, or PA, is the Adventure Aquarium- formerly the Camden Aquarium. There are many things to see and do inside, from new exhibits, to interactive touch pools, and educational experiences. You can get a hot lunch there, bring your own and grab a table, and spend the whole day inside. (There are also outdoor exhibits.)
Featuring more than 8,500 aquatic species throughout two million gallons of water, Adventure Aquarium is the only aquarium in the world to exhibit hippos and also home to the largest collection of sharks on the east coast – including a Great Hammerhead Shark. Located just minutes from downtown Philadelphia on the Delaware waterfront, visitors can get up close and personal with sharks and stingrays they can touch. They can also explore one-of-a-kind exhibits, including hippos, penguins and a shark tunnel.
For more info or to plan your visit, head to http://www.adventureaquarium.com/