Arizona GuideArizona, also known as the Grand Canyon State, is located in the American Southwest. Admitted as the 48th State of the Union in 1912, Arizona is home to the Grand Canyon as well as a variety of terrain, climates and cultures. HotelsFind hotels in Grand Canyon National Park, Phoenix, Tucson, Tempe, Flagstaff and more. Grand CanyonThe Grand Canyon is a UNESCO World Heritage Site that is located entirely in northern Arizona and is one of the great tourist attractions in the United States. PhoenixPhoenix is the capital of the state of Arizona as well as the most populous city in the American Southwest and sixth largest city in the United States. TucsonTucson is the second-largest city in the state of Arizona, in the United States of America. Greater PhoenixGreater Phoenix is a region of Arizona surrounding Phoenix. The total area accounts for 4,039,182 residents and is currently the 13th largest metropolitan area in the United States. Northern ArizonaNorthern Arizona is a region in Arizona, a state of the United States of America. South Central ArizonaSouth Central Arizona is a region in Arizona, a state of the United States of America. Eastern ArizonaEastern Arizona is part of the state of Arizona, in the United States of America. Western ArizonaWest Arizona is a region in Arizona. Counties: