Fulwell Quarry Local Nature Reserve
- The disused quarries at Fulwell and Carley Hill are of national geological importance showing the greatest variety of and the most spectacular development of dolomites (from the Late Permian Concretionary Limestone Formation, 235 million years ago).
Hetton Bogs Local Nature Reserve
- Hetton Bogs Local Nature Reserve (LNR) comprises two main parts, the formal Park and the Bogs. The LNR is located between Hetton-le-Hole and Houghton-le-Spring, grid reference NZ345486.
Hylton Dene Local Nature Reserve
- Hylton Dene was declared a Local Nature Reserve in August 2003. It includes Hylton Castle, the Main Dene, Tilesheds, Bunny Hill and Colliery Pond.