Merrivale is probably the best known and most visited of the prehistoric sites on Dartmoor, Devon (England) partly due to its ease of access and partly due to the wealth of monuments that greet the visitor. The most conspicuous of these are the pair of long stone rows that cross the landscape of Longash Common but close-by is also a settlement site, a stone circle with a tall outlying stone, a couple of ring cairns and a cist as well as several other cairns and a length of reave.
From:
http://www.stone-circles.org.uk/stone/merrivalerows.htm