Clattern Bridge, which crosses the Hogsmill River, is one of the oldest bridges in Surrey and it is a Scheduled Ancient Monument. The earliest known reference is in a deed of 1293 and the medieval name 'Clateryngbrugge' is thought to have been descriptive of the sound of horses crossing the bridge. The stone arches on the downstream side are the oldest parts of the bridge which until the 19th century was only 8ft wide.