From ancient times to today, man has always built testaments to his existence and ingenuity. See what inhabitants on three continents have left for us to discover.

The Great Wall of China Why did three different emperors work so long and hard to complete an enormous wall? What did it shut out? What did it keep in?

The Anasazi Pueblo Bonito What do the hieroglyphics and architecture tell us about the Anasazi religion and advanced understanding of astronomy?

Castles of the Rhine Military fortress and royalty home. How were they built and who lived in them during Germany's military conflicts throughout history?

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