a large, circular hole in the ground sides may be steep or sloping sometimes a rock wall or ledge around the perimeter may be filled with water or other liquids could be covered with a thin layer of soil or vegetation
pit which is a large, circular hole in the ground pit which has sides may be steep or sloping pit which has sometimes a rock wall or ledge around the perimeter pit which may be filled with water or other liquids pit which has could be covered with a thin layer of soil or vegetation