monument on the donon mountain peak in the vosges. historic sacred place where the rituals of the celts and proto-celts took place

aerial age alsace ancient archaeological archeology architectural architecture burial celtic celts col column cultural donon druids eire europe fall france heritage historical history landmark landscape megalithic monument mound mythical nature neolithic newgrange old outdoors pillar prehistoric religion rock roman sacred schirmeck solstice stone stones temple tomb unesco vosges world