The Bird House.
The National Zoological Park is a part of the Smithsonian Institution, the world’s largest museum and research complex. The Smithsonian includes 18 museums and galleries, as well as the National Zoo. The words "National Zoo" represent a large, complex, and diverse organization with a multifaceted mission: demonstrate leadership in animal care, science, education, and sustainability. The National Zoo is far more than a place where people can see wild animals. We are a 163-acre zoological park set amid Rock Creek Park in the heart of Washington, D.C. Open to the public 364 days a year, we are home to 2,000 individual animals of nearly 400 different species. Our best known residents are our giant pandas, Tian Tian and Mei Xiang. The Zoo is one of Washington's and the Smithsonian's most popular tourist destinations. We welcome up to two million visitors—from the local community, the country, and the rest of the world—every year, free of charge. http://nationalzoo.si.edu/