Dunstable Downs are part of the Chiltern Hills, in southern Bedfordshire, England; and are located near the town of Dunstable. They are a chalk escarpment forming the north-eastern reaches of the Chilterns. At 243 m, Dunstable Downs are the highest point in the county of Bedfordshire. Because of its elevation, Dunstable Downs hosted a station in the shutter telegraph chain which connected the Admiralty in London to its naval ships in the port of Great Yarmouth during the years 1808 to 1814.