Megalithic

I suppose this scene just about still counts as a natural one, despite being manmade. Pictured is a megalithic tomb dating from the Neolithic period (4000 – 2500 BC). This form of burial monument is known locally as a portal dolmen. The term "dolmen" comes from the Breton language, where dol means "table" and men means "stone," reflecting the table-like shape of these megalithic structures.