But although some footprints were first discovered in the mid-1980s, serious study of the site did not begin until 1994. Subsequently, researchers realized the full extent of the discovery. And what a discovery it was.
Yes, at Cal Orcko they found a massive limestone wall almost 4,000 feet in length. Stretching up over 250 feet from the quarry floor, its surface was covered in more than 5,000 prehistoric footsteps.