It would seem I've stumbled across something I wasn't meant to see-- a local super villain constructing his ultra secret lair. The dastardly evildoer appears to be building some sort of spherical time machine inside the building. Thank goodness I found it in time, so I can report it to the proper authorities.
I'm sure it has to be a time machine. What else could it be, right? It's the only thing that makes sense.
Or perhaps it's some sort of teleportation chamber? One he can use to materialize the contents of bank vaults into? Or dinosaurs! He may be using it to teleport dinosaurs from the past, so he can turn them loose on the city and then use the resulting chaos as a distraction so he can rob the various vaults around the city!
Oh Jesus. I just accidentally wrote the Man Of Steel sequel. Sorry, guys.