San Francisco - the largest economic and cultural center of Northern California, one of the most famous cities in the United States. "City by the Bay" is located on the West coast of the United States, in the Northern part of the Peninsula of San Francisco, separating the Bay from the Pacific ocean. The mainland part of the city in the form close to a square with sides of seven miles, in addition, part of San Francisco are small Islands of Alcatraz, Treasure, Yerba Buena, and others.
San Francisco is in a zone of high seismic activity, near to it are the faults of the San Andreas fault (along the Peninsula of San Francisco) and Hayward (on the Eastern side of the Bay). Small earthquakes happen here often enough, but twice throughout its history (1906 and 1989) the city suffered greatly from earthquakes.
For the territory of San Francisco is characterized by complex terrain, it naschityvaet about fifty hills, the highest of which is mount Davidson (283 meters above sea level). Widely-known so-called "seven hills" on which, according to legend, the town was founded: "Gemini" twin Peaks, Telegraph Hill, Nob hill, Russian hill, Rincon hill, mount Sutro.