Ciudad Constitucion is located 92 miles southwest of Loreto and 125 miles north of La Paz in the heart of the agricultural valley of Santo Domingo. This farming center had its origin with the colonization of the valley in 1940. Families settled around a ranch called 'El Crucero', and the area quickly became a commercial center. It is now the second largest city in Baja California Sur.

Thanks to the great efforts of the Mexicans in using the deep wells for watering, the desert area now produces rich harvests of wheat, chickpea, cotton and citrus fruits. Ciudad Constitucion has many visitor services, including hotels, restaurants, bars, discos, travel agencies, repair shops and shopping.

The town is near Magdalena Bay on the Pacific Ocean. Just west is San Carlos, a large commercial port. Hundreds of visitors enjoy viewing gray whales here from January to March. Visitors can enjoy many other sights, including the islands of Margarita and Magdalena with their white dunes, the bays of Magdalena and Santa Maria, the ducks' island with its colonies of migratory and resident birds, the estuary, the mangrove trees and the comings and goings of ships and cruisers in the harbor. San Carlos is an excellent option for the eco-tourist, offering a variety of tourist services: hotels, restaurants, bars and tours.