The 150 acres of the Maryland Zoo in Baltimore—the third-oldest zoo in the country—are a natural stomping ground for little ones seeking out the spectacle of elephants, lions, giraffes, hippos, and penguins, among the more than 2,000 animals that make this their home. Don't miss the warthog exhibit, said to be the nation's only dedicated environment for the bumpy beasts. Favorite sights include a chimpanzee house and leopard lair, polar bears frolicking in an arctic pool, and a petting zoo with a re-created barnyard. If you make it all the way to the Africa exhibit and are too tired to walk back, you can hop on a tram that goes back to the entrance. Surrounding the zoo is Druid Hill Park, which was designed by Frederick Law Olmsted Jr.; the park has seen better days, but it's worth a drive through.
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