6 Lost Civilizations: Media
Some of history’s greatest mysteries
Images
Easter Island: Ahu Tongariki
Ahu Tongariki, Easter Island, Chile.
Jeremy Woodhouse—Digital Vision/Getty Images
Monks Mound, Cahokia State Historic Site, Illinois
Monks Mound, the largest man-made earthen structure in North America, is part of...
Courtesy of Cahokia Mounds State Historic Site