Arizona's National Parks and Monuments

Arizona's 20 national parks and monuments celebrate the natural wonders and rich heritage of Arizona, preserved through the efforts of countless citizens and the American Antiquities Act of 1906. Aggressively implemented by eight US presidents, this legislation permits the president to unilaterally proclaim sites as national monuments without congressional action. The Antiquities Act was applied in Arizona 23 times, more so than any other state in the union. Using more than 200 historical p...