Before Columbus

A unique archaeological dig in Puerto Rico is shedding light on Caribbean native life in the centuries before Europeans showed up. It's like nothing found before in this region: a stone plaza measuring some 130 feet by 160 feet, carved with elaborate petroglyphs. The site was presumably built by the Taino people or their ancestors and was in use for as long as 900 years, from 600 to 1,500 AD.