The village of Wimbledon was built on a plateau between two rivers - Beverley Brook to the west and the River Wandle in the east. The plateau rises to a height of 55m (180 feet). The surrounding area is underlain by clay to a depth of 150m (500 feet), but the plateau is covered by a layer of gravel and sandy loam. Rain water seeping through this emerges as springs on the side of the hill. This provides a good fresh water supply and probably accounts for the early settlement of the area.