Wicken Fen is a wetland area which has been cared for by the National Trust since 1899. A Black Dog is said to haunt the area around Wicken Fen.
Specific Location: Wicken
Here’s an interesting piece of Cambridgeshire folklore I found in a book called "Folktales of the Fen Country". Joseph Hempsall was a true born "Fen Slodger". He lived in a small cottage on the Soham side of Wicken Fen during the late 17th century. Every evening Hempsall would cross the fen, known locally as "Big Bog" to drink with his friends at tavern in Wicken.