Californiais the most populous state in the United States. California contains the nation's most populous county, Los Angeles County, and its seat, Los Angeles. California became a U.S. territory in 1847 when Mexico surrendered it.Sacramentois the capital city of the U.S. state of California and the seat of Sacramento County.Los Angelesofficially the City of Los Angeles and often known by its initials L.A., is the second-largest city in the United States after New York City, the most populous city in the state of California,San Francisco, officially the City and County of San Francisco, is the cultural, commercial, and financial center of the Western United States, and the only consolidated city-county in CaliforniaSan Diegois a major city in California, in San Diego County, on the coast of the Pacific Ocean in Southern California, approximately 120 miles (190 km) south of Los Angeles and immediately adjacent to the border with Mexico.The Colorado Riveris one of the principal rivers of the Southwestern United States and northern Mexico (the other being the Rio Grande). The 1,450-mile (2,330 km) Colorado River drains an expansive, arid watershed that encompasses parts of seven U.S. and two Mexican states.Mount Whitneyis the highest summit in the contiguous United States and the Sierra Nevada, with an elevation of 14,505 feet (4421.0 m).Yosemite National Parkis a United States National Park spanning eastern portions of Tuolumne, Mariposa and Madera counties in the central eastern portion of the U.S. state of California.Mono Lakeis a large, shallow saline soda lake in Mono County, California, formed at least 760,000 years ago as a terminal lake in an endorheic basin. The lack of an outlet causes high levels of salts to accumulate in the lake. These salts also make the lake water alkaline.