Tagua-Tagua represents a very early Paleo-Indian archaeological site, and it is dated to 11,380 ±380 14C yr BP (before present). This is an ancient pleistocene site where humans butchered large animals that they hunted. The site was discovered in the 1860s. An upper, younger stratum is about 1 m below the surface. The older stratum is about 2.4 m below the surface, and contains chipped stone tools. Horse and mastodon remains are represented, as well as smaller animals.