El Camino Real (California)
El Camino Real is a 600-mile (965-kilometer) commemorative route connecting the 21 Spanish missions in California from Mission San Diego de Alcalá in San Diego to Mission San Francisco Solano in Sonoma, along with a number of sub-missions, four presidios, and three pueblos. The route is historically associated with a network of royal roads used by inhabitants of New Spain. The modern commemorative route in the U.S. state of California is named after these roads, and is officially defined in the California Streets and Highways Code to run along various roads from Interstate 5 at the Mexican border to State Route 12 in Sonoma.
Read on Wikipedia