A city of western California on a peninsula between the Pacific Ocean and San Francisco Bay, an inlet of the Pacific. A Spanish presidio and mission were founded here in 1776. The first settlement was known as Yerba Buena, a Mexican city. The name was changed to San Francisco after control of the town passed to the United States in 1846, two days after California was lost by Mexico during the Mexican-American war. Discovery of gold nearby in 1848 changed the city from a small community into a thriving boom town known for its lawlessness and bawdy amusements. The city was all but destroyed by a devastating earthquake and fire on April 18, 1906. Population: 800,000. making it the second most dense city in the United States; at least four million people live in the metropolitan area. (known as bay area).







San Francisco 1906 earthquake and fire.