Farnham is a town in Surrey, England, within the Borough of Waverley. Farnham is the largest town in Waverley, and one of the five largest conurbations in Surrey. It is of historic interest, with many old buildings, including a number of Georgian houses. Farnham Castle overlooks the town. A short distance southeast of the town centre are the ruins of Waverley Abbey, Moor Park House and Mother Ludlam’s Cave. Farnham is twinned with Andernach in Germany. It is drained by the River Wey (North Branch) which is navigable only to canoes at this point.