The Oldest Constitution: United States of America's constitution is the world's oldest constitution. It's been ratified by the necessary Ninth State on 21 June 1788 and declared to be in effect on 4 March 1789.
Firsts in U.S. Cities Ambulance service Cincinnati, Ohio 1865 Aquarium New York, N.Y. Dec. 10, 1896 Automobile service station Pittsburgh, Pa. Dec. 1, 1913 Baseball stadium Pittsburgh, Pa. June 30, 1909 Cathedral, Roman Catholic Baltimore, Md. Built 1806–1821 Commercial radio station Pittsburgh, Pa. Nov. 2, 1920 Computer Philadelphia, Pa. 1946 Daily newspaper Philadelphia, Pa. Sept. 21, 1784 Electric company New York, N.Y. Oct. 15, 1878 Elevator, safety New York, N.Y. 1852 Ferris wheel Chicago, Ill. June 1893 Hospital Philadelphia, Pa. Feb. 11, 1752	. city firsts(continued)  . Lighthouse Boston, Mass. 1716 Motion picture theater Los Angeles, Calif. April 2, 1902 Opera house New Orleans, La. 1859 Parking meter Oklahoma City, Okla. July 16, 1935 Public museum Charleston, S.C. Jan. 12, 1773 Public TV station Houston, Tex. May 25, 1953 Railroad station Baltimore, Md. May 1830 Railway, elevated Chicago, Ill. 1892 Revolving restaurant Seattle, Wash. May 22, 1961 Skyscraper Chicago, Ill. 1885 Subway Boston, Mass. Sept. 1, 1897 Traffic light Cleveland, Ohio Aug. 5, 1914 Zoological garden Philadelphia, Pa. July 1, 1875	EXTREME POINTS OF THE UNITED STATES Northernmost point:Point Barrow, Alaska Easternmost point :West Quoddy Head, Maine Westernmost point:Cape Wrangell, Alaska(Attu Island) Southernmost point:Ka Lae(South Cape),Hawaii