2.11 ha (5.21 acres)

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Cassop Vale showcases some of the most diverse wildlife in County Durham featuring areas of woodland, open water and lowland grassland supporting a varied population of plants and birds. The unique nature of the area is a result of the lime rich soils, caused by a tropical sea which was present at the site around 250 million years ago. It is important to note that the western section of the reserve is restricted to permit holders only, for more information visit the landowners website via the U