Elfangor's Visits Edit
Elfangor-Sirinial-Shamtul first visited the abandoned construction site (or what would become the construction site) in order to bury the Time Matrix, and thereby keep it out of the hands of the Yeerks. After doing this, he goes into a self-imposed exile on Earth. Many years later, after rejoining the Andalite-Yeerk War due to the Ellimist's interference, his fighter was shot down while in Earth orbit. Elfangor returned to the location of the Time Matrix, intending to use it to save Earth from the Yeerk threat, only to find that the previously forested location had become a construction site and that the Time Matrix was inaccessible.A group of human children, walking through the construction site on their way home, see Elfangor's fighter crash, and approach him. As the Yeerks approach the construction site, Elfangor gives the children the power to morph via his Escafil device, but was killed by Visser Three after the Yeerks land. The Yeerks destroy Elfangor's fighter, leaving no trace that anything unusual had happened, and the human children, who would come to call themselves the Animorphs, escape.
Animorphs return to the construction site Edit
In The Visitor, the Animorphs went to the construction site in order to save Rachel, who had been captured by Chapman and taken to Visser Three, whose Blade ship had landed at the site. They were able to rescue Rachel and escape the construction site once more. Much later, David, a student at the Animorph's school, finds the Escafil Device at the Construction site. When David becomes traitorous, the Animorphs return to the construction site to trap him in the form of a rat. They were able to lure him there by claiming that they had hidden the device there; trapping him in the various pipes in the area, they were able to lure him into a box and keep him contained until he was trapped in his morph.