Sure enough, while it looks like a large farming community, one building in particular sticks out like a sore thumb; most of the structures are wooden, and obviously built by teams of craftsmen, except for the temple, a structure of solid stone. But this building... this building looks like it's been built by something far above this tech level. The stones are smooth, and come at nice, neat right angles, and, while there's no obvious, visible signs of what it's for, the construct can sense the electronic waves propagating from the structure, likely for communication, both with other bases, and possibly with those drones it saw flying around.