Ouch. Hope that birds eye view was before it was open to the public. Looked like you could roll a bowling ball down the isles and not hit anyone. That scares me.
If that is what I think it is, it's ancient glass (not just old or antique) It could be Roman. And it could be more modern Art Nouveau If it is a repro they did a good job making the glass look like it was in advanced stages of decomposition.
Ethan, started at 14 and obviously still going. Some of my fondest memories are digging bottles at that age. I encourage you to dig as much as possible, but don't go around looking for surface dumps. I wasted too much time doing that when I could have been digging privies. At 15, you are at...