An elderly-looking couple sail away into the distance on the Norfolk Broads at Potter Heigham, Norfolk, England. With a large red sail hoisted on a slow breeze, the sailors progress at a sedate pace past reed beds in one of the National Nature Reserves (NNR) designated by Natural England as key places for wildlife and natural features in England. The Broads are a network of mostly navigable rivers and lakes in the English counties of Norfolk and Suffolk. The total area is 303 square kilometres (117 sq mi), most of which is in Norfolk, with over 200 kilometres (120 mi) of navigable waterways. There are seven rivers and 63 broads, mostly less than 4 metres (13 ft) deep. Thirteen broads are generally open to navigation, with a further three having navigable channels.
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