The Uffington White Horse is a highly stylized prehistoric hill figure, 110 m long feet), formed from deep trenches filled with crushed white chalk. The figure presumably dates to the Iron Age BC–AD or the late Bronze Age BC)
Ancient megalithic sites of Ireland. Thought to be the world's oldest sundial carved on a stone outside the tomb of Knowth, Co. The two holes in the center of the image probably held the gnomon (object used to cast the shadow).