National Mall
The National Mall, often just called the Mall, is an open park in the city center Washington, D.C.  It has many museums, like the Smithsonian and the National Gallery of Art.  It is found between the United States Capitol and the Washington Monument, which are about one mile apart.  It is a popular place, and is used for exercise, recreation, music concerts, festivals, and protests.  It is also visited by many tourists - over 25 million people come to the Mall each year.