Great Eastern Pingo Trail
Great Eastern Pingo Trail is a  long footpath along a disused railway line north of Thetford in Norfolk. It is a   Local Nature Reserve, and it crosses three Sites of Special Scientific Interest, Thompson Water, Carr and Common, Breckland Forest and Cranberry Rough, Hockham. It also crosses Thompson Common, which is a nature reserve managed by the Norfolk Wildlife Trust and is a Nature Conservation Review site, Grade I. It further crosses Norfolk Valley Fens  Special Area of Conservation and Breckland Special Protection Area.

This site has around 300 pingos, shallow pools formed when ice melted at the end of the last ice age. There is a mosaic of habitats with a large lake, Thompson Water, at the western end.

References

Local Nature Reserves in Norfolk