Spain ruled over Arizona since 1539, before yielding it to Mexico and has been independant since 1821. 27 years later, the United States acquired it through the american-mexican war. On February 14, 1912 at last, Arizona officially joined the Union as the 48 th State. Arizona History
Grand Canyon National Park At the South West of the United States in the state of Arizona, the Grand Canyon National Park contains one of the most incredible and captivating phenomenon on the planet. A gigantic gorge, eroded since millions of years by the sometimes rampaging Colorado river; a ravine nearly 450 kilometers long and a maximum dept of 2000 meters. It is the largest gorge in the world. .