寻找历史 – Cahokia: The Mound Builders (历史频道纪录片)

Narrated by David Ackroyd

One thousand years ago, Cahokia was the largest city in North America. Thought to be the center of a society that built thousands of mounds of different sizes and shapes, Cahokia may have been the zenith of prehistoric society. What tantalizing secrets do the mounds reveal about the lost tribe that built them?