On Dartmoor there are over 60 known stone rows. They remain an enigma - no one knows for sure why they were built. At Merrivale there are three rows, two double and one single. Both the double rows run from east to west but they are not parallel.
This photograph shows the largest of the three stone rows and is 264 metres (864ft) long and contains over 200 stones.
The closest town to Merrivale is Tavistock and the nearest village is Princetown.