Located along the south bank of the Colorado River, the town was founded in the 1850s and, later on, was the centre for military, and mining operations. Yuma is not one of the main cities in Arizona, and it is a shame, given its splendid location and tons of activities with something available for everyone. This pretty city in southwestern Arizona, bordering Mexico and California, is renowned for its history, rugged desert landscapes of the Sonoran Desert, museums, excellent architecture, spacious parks and pleasant winter weather. There are many fantastic things to do in Yuma AZ, nicknamed the sunniest city in the world.