CAHOKIA, ILLINOIS
OLD COPPER CULTURE II, MN
GRAVE CREEK MOUND II, WV
MONKS MOUND, CAHOKIA, ILLINOIS
PETERS CREEK MOUND
THE BATTERSEA SHIELD (LV)
FOUR CHAMBERS (II), CO
ROCKS & ROWS
OIL CITY GLYPHS II, PA
IKOM MONOLITHS, NIGERIA
OLD COPPER CULTURE I, MN
MAN OF BACKA, SWEDEN
SPHERICAL ROCK, WI
EARLY DISCOVERY OF THE WORLD (I)
SERPENT MOUND, OHIO
GLYPH OF A SAILING BOAT
A SWORD FOR AMERICA
HOUGHTON’S PETROGLYPH
THE BRANDENBURG STONE
ABOUT THE BRANDENBURG STONE
