Giant panda and celebrity sensation Bao Bao (Courtesy Smithsonian's National Zoo)
Founded in 1889, a 163-acre zoo with more than 2,000 animals like giant pandas Tian Tian and Mei Xiang plus female cub Bei Bei. Elephant Trails exhibit with a wooded exercise trek. Asia Trail with giant sloths and clouded leopards. American Trail with North American species (sea otters and seals). Solar-powered carousel ($3.50). Parking $25. Check website for seasonal hours. Free.