All around the Cotswolds the local honey-coloured limestone, used for everything from the stone floors in the houses to the tiles on the roof, has ensured that the area has a magical uniformity of architecture. You will see 'Drystone walls' everywhere in the fields. Many were built in the 18th and 19th centuries, a matter of considerable skill as there is no cement to hold the walls together. They represent an important historical landscape and a major conservation feature - and are of course still used by farmers to enclose sheep and cattle.