Durham Dales

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The Durham Dales are a series of valleys in the west of County Durham, North East England. They are the Durham portion of the North Pennines, the northernmost part of the Pennine uplands. The principal valleys are Teesdale in the south and Weardale in the north, each of which has several side valleys, including Baldersdale, Lunedale, and Rook Hope. The part of Teesdale south of the Tees was historically in Yorkshire.