The large desert found in the southwestern USA is the **Sonoran Desert**. This desert covers parts of Arizona, California, and Mexico, characterized by its unique flora, including the iconic **saguaro cactus**. The Sonoran Desert is known for its diverse ecosystems, supporting a variety of wildlife adapted to harsh desert conditions. Its natural beauty includes stunning landscapes with dramatic rock formations and vibrant desert flora. The desert also has significant cultural importance, inhabited by indigenous peoples who have thrived in this arid climate for centuries.