Just minutes outside Philadelphia is a place where you can see frolicking penguins, touch a shark and stand nose-to-nose with a 3,000-pound hippo. The miraculous water world at Adventure Aquarium has something for everyone: sea turtles, jellyfish, a giant octopus and the only hammerhead shark on exhibit in the U.S. Discover and learn about the enormous and deadly prehistoric marine reptiles that ruled the seas while dinosaurs walked the Earth. Take the 40-foot Shark Tunnel through a 550,000-gallon tank that holds the largest collection of sharks on the East Coast. And if it's not enough to be swimming with the sharks, head over to the Hippo Haven, where you can meet big-and-beautiful Button and Genny, a pair of Nile hippos. When they dive underwater, they just might swim up to the glass where you're standing and give you a hippo kiss.