No, they were nowhere near this. To do so, they would have had to make advances in a number of other technologies. We would see some evidence of this mixed in with the rest of their crapola.
Riggy, that was the exact point I just made in the previous post. No one has unearthed everything, unearthing something does not guarantee recognition of what it is and the significance it had, and no people won't just recognize the difference automatically. Archaeologiests disagree, fuss, argue, and change their minds about what they have found all the time. The little gold thing I posted has a million different theories floating around. Some say it's a plane, some say it's a bug, some say it's a bird. Some say it means precolumbian people also has some concept of aviation, some say it's just a nice decoration. For all we know it's proof of aliens or something like your spaghetti monster

; but as I said earlier, just looking at something doesn't give you all the pertinent details and the records of what exactly it is are long lost. As a side note, to the people who made the thing it should have been painfully obvious what it was at the time, so your recognizing what you are looking at around you now does not magically transpose onto people in the future.
You say it is far fetched that we could be missing something that big, but less than 100 years ago it was mind blowing that he Egyptians built the pyramids without outside help. However, far fetched is relative to the amount of knowledge about a civilization that is currently uncovered and like I said,
we do not have a FULL record of ANY ancient culture. 100 years ago, the structure DNA was unsupported, curing polio was unsupported, modern aviation was unsupported, mag lev trains were unsupported, the internet was unsupported, pluto was still a planet

, world wide communication was unsupported, space travel was unsupported, etc... So if someone were to only find artifacts from a hundred years or so and further back, it looks impossible that we eventually accomplished the things we eventually accomplished. It's a result of limited records both in the future and now. So did people walk on the moon in prehistoric times? I wouldn't bother to speculate that far. If was proven would I go to pieces shocked? No, I'd shrug say "That's awesome! how did they do it?"
I think people nowadays feel it diminishes current achievements if they weren't truly the first, a matter of ego, and that's why they resist so hard the notion of Ancient people being potentially more advanced than we suspected. But the truth is it doesn't matter. If we both accomplished then we simply both accomplished. Being first at it is just a petty distinction, the real import is in the achievement.
But we really don't have enough information to assume we know everything about the technological situation in ancient times, even if we are fairly confident. Assuming you know the whole situation is not the same as actually having solid backing for assumption.

For now all we can actually say definitively is that we don't know of anything that points to it. We can't actually rule things out. It's ruling things out that causes confusion when it gets proven that you couldn't rule something out.
As for those nifty pics, I'm not saying that everything we made will last forever. Yes, over an ENORMOUS amount of time, our metal statues and sky scrapers will be worn to nothing by wind and rain.
See that's the point of the pictures. It didn't take years. Each of those pictures took only one incident to scrape all the evidence down and over the course of a lot of time a lot of those kinds of events can take place. That which you are thinking would take a long time to become unrecognizable could suffer a severe hit right now and be unrecognizable long before time has a chance to touch it. Our artifacts, with the exception of maybe those plastics that don't degrade, are just as susceptible to being destroyed, and even the plastic can be lost and twisted beyond recognition. The plastic should be warped beyond recognition long in the future; it's just the basic material that is hard to destroy by natural processes.
Also, the further in time you get removed from something, the more distinctions get hard to place. A couple thousand years from now, archaeologists could easily have a hard time placing exactly the stuff from our time, the distinctions between decades are clear now but in the future with say a limited record it could look like more aesthetic differences between concurrent groups. Stuff will be in odd places, disfigured, poorly preserved, etc. Now would they be able to tell the difference in Modern Rome and Ancient Rome, likely yes but that is as much a matter of dating processes rather than just eyeballing the difference.
You can't predict what discoveries are made and what artifacts are unearthed over time. Really, the stuff you see as impossible now can in the future become laughably plausible.
And I'll have you know that this discussion is interfering with my daily game playing.
