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Walla Walla, in southeastern Washington, is perhaps the only wine region in the world renowned for both its delicious red wines and its jumbo-size sweet onions—about 15 million pounds of which are harvested each year. Like Vidalia onions from Georgia and Maui onions from Hawaii, Walla Walla onions are low in sulfur (the compound that makes you cry) and so sweet they can be eaten out of hand, like an apple.