The desert found in the southwestern United States is the Sonoran Desert. This vast desert region spans Arizona, California, and parts of Mexico and is known for its unique ecosystems and biodiversity. The Sonoran Desert experiences extreme temperature variations and low rainfall, fostering specialized flora such as the iconic saguaro cactus and various species of wildlife, including desert tortoises and Gila monsters. The region is also rich in cultural history and is home to various Native American tribes.