Founded in 1878, the Maryland Zoo in Baltimore is the third-oldest zoo in the country and combines excitement and education for visitors of all ages. The 161-acre / 65-hectare zoo is home to a wealth of creatures from every continent. On the Harold and Selma Taylor African Journey, attractions include leopards, cheetahs, lions, primates, elephants, rhinos, penguins, zebras, giraffes, gazelles, warthogs and more.