For those following construction of the Apple campus, a short video was posted this week showing the current progress.
Two longer videos from earlier this summer show much greater detail. (See below.) Visible in the other two videos are a pair of bridges, most likely temporary, providing access to traffic to the center of the complex. Also visible is a tunnel going under the structure, perhaps to provide permanent access to the center. Another interesting structure on the campus outside the ring consists of a deep foundation on one end and a circular structure on the other. Our guess is this may be a utility building (water recycling, backup power) or an R&D building. It will be interesting to find out. We also located a website with additional videos and project information; click here for the "51 facts about the new Apple spaceship HQ."