Sandman
I'm sure Nell Gynne's portrait with the sheep gave you the shaggy clue. Old rowley could pick them.
Yes nicely chosen answer, not quite 'ladies of the night' you can't marry but bed warmers
Menhirs stones, Carnac in Brittany. Or Carnac stones.
Correct
The Carnac stones are an exceptionally dense collection of megalithic sites around the French village of Carnac, in Brittany, consisting of alignments, dolmens, tumuli and single menhirs. The more than 3,000 prehistoric standing stones were hewn from local rock and erected by the pre-Celtic people of Brittany, and are the largest such collection in the world. Local tradition claims that the reason they stand in such perfectly straight lines is that they are a Roman legion turned to stone by Merlin or Saint Cornelius – Brittany has its own local versions of the Arthurian cycle. A Christian legend associated with the stones held that they were pagan soldiers in pursuit of Pope Cornelius when he turned them to stone. Most of the stones are within the Breton village of Carnac, but some to the east are within La Trinité-sur-Mer. The stones were erected at some stage during the Neolithic period, probably around 3300 BC, but some may date to as old as 4500 BC.
Would this be a Roman road in Africa? - I have a feeling I saw it in an episode of Long Way Down - Ewan McGregor and Charlie Boorman biking down Africa...