The main wine-growing regions composing the United States vineyard are California, the State of Washington, Oregon and the State of New York. 9,000 domains are also called wineries, which majority is located in California. 90% of the wine production takes place in this emblematic region. This state benefits from an international reputation, especially thanks to the Napa Valley where famous domains are gathered, such as Opus One. The West Coast has an oceanic, even mediterranean climate whereas on the East Coast, the vineyards are subjected to a continental climate, similar to the one in Germany or Austria.