Castle Eden Dene National Nature Reserve

Castle Eden Dene is a Site of Special Scientific Interest and National Nature Reserve in the Easington district of County Durham, England. It is located mostly in Peterlee, between the A19 and A1086 roads.The dene is the largest, and biologically the richest, of a series of deep ravines that have been incised through the Magnesian Limestone and overlying boulder clay of coastal Durham by streams flowing into the North Sea.

The Castle at Castle Eden, County Durham, England, is an 18th-century mansion house and a Grade II* listed building. No trace remains of the medieval castle of Robert the Bruce.The Burdon family of Castle Eden had their origins in Stockton on Tees, where the first Rowland Burdon was mayor nine times in the 17th century.