People using the corpse roads assumed that they could be passages for ghosts. The ancient spirit folklore that attached itself to the medieval and later corpse roads also may have informed certain prehistoric features. In Britain, for instance, Neolithic earthen avenues called cursuses link burial mounds: these features can run for considerable distances, even miles, and are largely straight, or straight in segments, connecting funerary sites. The purpose of these avenues is imperfectly understood, but some kind of spirit-way function may be one reasonable explanation. Similarly, some Neolithic and Bronze Age graves, especially in France and Britain, are associated with stone rows, like those at Merrivale on Dartmoor, with intriguing blocking stones at their ends.