"Bordering Mexico, Arizona became the 48th U.S. state in 1912. It became a territory after the land was obtained in the Mexican War and from the Gadsden Purchase. The state has varied terrain, and it contains deserts, pine forests, and many parks. Other notable points of interest include the Grand Canyon, the Hoover Dam, Lake Mead, and the Painted Dessert. Our collection of photographs shows off the many aspects of the state.