You just can't come to Brittany without seeing the rows of menhirs in Carnac. The 6000 year old megalithic site of Carnac is the mecca of European prehistory.
.Its some 3000 menhirs are spread over a 40 hectare site of 4 km in length, organized architecturally. The rows of Mènec, Kermario and Kerlescan and of Petit Menec (La Trinité-sur-Mer), all part of the "Carnac group" constitute one of the most important standing stone monuments in Europe. More information about Carnac