National Nature Reserve in uplands of County Durham and Cumbria (Eden Valley) with the river Tees running through. Reservoirs, waterfalls and other river features easily accessible for river studies, streams for dipping and measuring. Upland farming - the importance of hay, and historic sites - neolithic onwards - can be studied. Interactive programmes can be customised to suit visiting group. On the Teesdale side of the Reserve a small cottage/education point can be used for shelter and as a destination for an adventurous walk and the use of local visitor centre can be negotiated. Eden valley side of the Reserve - no facillities.