This document provides information about several landmarks and museums located in Washington D.C., the capital of the United States. It mentions the Potomac and Anacostia Rivers, as well as the Chesapeake and Ohio Canal. Some of the notable sites discussed include the Lincoln Memorial, World War II Memorial, Washington Monument, National Mall, National Museum of Natural History, National Air and Space Museum, National Museum of American History, National Zoological Park, U.S. Capitol building, White House, Pentagon, Theodore Roosevelt Island, and the National Archives.