Sacramento is located in the heart of the Central Valley.  Sacramento is often referred to as "The Capital City" because it is the Capital of California and sometimes called "The River City" because downtown Sacramento is where the Sacramento River from the North and the American River from the East come together.  Sacramento was recognized as one of the "most livable" city's in the country by Time Magazine.  It is one of the most culturaly diversified cities in the country too. 
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