alignment of menhirs in the forest at carnac southern brittany gulf morbihan neolithic site france

age alignments archeology astronomy autumnal blue brittany building callanish carnac ciel cloud cloudless culture dakota dolmen era european fall forest france fund grass green grove history kermario landscape leave lined material menhir menhirs monument morbihan mound nature oak outdoor park path pebble place poulnabrone precious prehistoric rainforest religion row season sky social south spirituality spring stone stones tourist tree wood