The Menec "group of standing stones" is the westernmost of the largest Carnac megalithic monuments. According to latest counts, it consists of 1,050 menhirs. It stretches over 950m in length, lying south-west to north-east.
The monument starts in the south-west with an oval enclosure (70 x 90m). Some of its 71 remaining blocks can be found between the buildings of the village of Le Menec. The village was probably built during the Middle Ages, the megalithic monument having been used as a line of defense.
A total of eleven lines spread over a width of 100m lead away from this enclosure. Seven of them start on the northern side, while the other four are set a little further north. This layout is maintained over almost 400m, in spite of a few missing stones, especially in the southernmost line.
At this point, the southernmost line merges with its neighbour. From there on, it slants northwards and disappears. The set of lines then curves slightly northwards, its width decreases to less than 70m, the blocks become smaller and the layout becomes blurred. After having run for 700m, the lines come to an abrupt end when they meet what used to be a cultivated field (where stones were visible in the past).