Constitution Avenue NW is bordered by a number of important buildings and attractions. Beginning in the west are several independent federal agencies and institutes, as well as the headquarters of several large associations. These buildings include the United States Institute of Peace Headquarters, the American Institute of Pharmacy, the National Academy of Sciences, the Federal Reserve, the Department of the Interior, and the Organization of American States. The Ellipse, part of the grounds of the President's Park (which includes the White House), also borders the north side of Constitution Avenue NW and forms the boundary between the western and eastern segments of this part of the street. To the east on the north side is Federal Triangle, which contains the headquarters of a number of federal agencies. These include the Department of Commerce, Department of Justice, Environmental Protection Agency, Federal Trade Commission, Internal Revenue Service, and National Archives. The Embassy of Canada and John Marshall Park are located further east of Federal Triangle. Once past Pennsylvania Avenue NW, the E. Barrett Prettyman United States Courthouse, George Gordon Meade Memorial, and Department of Labor headquarters, and Senate Park border the north side of the avenue.