You'll need to bundle up if you'd like to welcome the official start of winter at the Cahokia Mounds. The winter solstice sunrise observance will take place at 7 a.m. Sunday at the Woodhenge site ...

The ancient North American city of Cahokia had as its focal point a feature now known as Monks Mound, a giant earthwork surrounded on its north, south, east and west by large rectangular open areas.