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 Bao Bao and newest sibling. 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). Exhibit buildings daily 10 a.m.-6 p.m., grounds 6 a.m.-8 p.m., visitor center/concessions 9 a.m.-5 p.m., shops 9 a.m.-5 p.m. Last admittance 7 p.m. Winter hours (Nov.-March): Exhibit buildings daily 10 a.m.-4:30 p.m., grounds 6 a.m.-6 p.m., visitor center/concessions 9 a.m.-4:30 p.m., shops 10 a.m.-5 p.m. Free entry, parking $22.