Map sheet number OL30 in the OS Explorer map series is the map of choice for people visiting the Northern and Central areas of the Yorkshire Dales, including Wensleydale & Swaledale. There is wealth of scenery in this part of the Yorkshire Dales National Park. Highlights of the area include: The valleys of Swaledale and Arkengarthdale, Aysgarth Falls, Hawes, and the River Wharfe.