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<p>Dry stone walls ? the thousands of miles of stone ribbon stretching across the landscapes of the Scottish Highlands, Yorkshire Dales and Cotswolds ? use construction methods which have existed for thousands of years. Indeed, dry stone structures in the Orkney Islands and Ireland are even older than the Egyptian pyramids. A dry stone wall is more than a pile of rocks. It is a carefully built combination of specialized stones, each co-operating ...Seguir leyendo