The Great Dorset Steam Fair (abbreviated GDSF, and since 2010 also known as The National Heritage Show) is an annual show featuring steam-powered vehicles and machinery. It now covers 600 acres and runs for five days. It is reputedly the largest collection of steam and vintage equipment to be seen anywhere in the world. The fair was founded by the Dorset Steam & Historic Vehicle Club, and has been held in Dorset, England, every summer since 1969. The most numerous exhibits are traction engines, tractors and farm machinery, but there are also sections for classic cars and commercial vehicles, working shire horses, rustic crafts, 'bygones' displays, and more. The show also has a market, autojumble, live music and funfair (some of which is powered by the steam engines).
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