Cahokia Mounds (Digging for the Past)

Just a few miles west of Collinsville, Illinois lies the remains of the most sophisticated prehistoric native civilizations north of Mexico. Cahokia Mounds explores the history behind this buried American city inhabited from about AD 700 to 1400, that was almost lost in metropolitan expansions of the 1960s and 1970s, but later became one of the best understood archeological sites in North America..