The Ancient Americas Ongoing Step into the windswept world of Ice-Age mammoth hunters. Walk through a replica of an 800-year-old pueblo dwelling and imagine your entire family cooking, eating, and sleeping in one small room. Explore the Aztec empire and its island capital, Tenochtitlan, a city of more than 200,000 people and an extraordinary feat of engineering for any era. Discover what Field Museum scientists and others have learned about the Americans who lived here before us, and how it’s changing nearly everything we thought we knew! More Information... Special Exhibition For All Ages Free with Museum admission.