Youtube has some great hidden history movies; especially on the intricate cut, and placed stone existing all around the world; our very best tech I don't think can duplicate that work as of yet. The stones are closely fit, and are often times of enormous weight.

On the flipside of 'mainstream', are people like Michael Cremo, "The forbidden Archaeologist", his entire practice is giving counter arguments to carbon dating. He covers the things that don't fit the archaeological, and geological 'approved narratives'. Another aspect of his studies, and lectures, cover other scientists such as himself; who stepped outside of the officially prescribed narrative; who also have become pariahs to the establishment.

In museums, and universities, there's a lot of stuff, they just don't put on display because it doesn't fit.

On that note, there's plenty of concern that at any magnetic pole shift, we may actually lose memory. Even with our memory, we're not that advanced individually. Most of society cannot tie their own 'proverbial shoelaces'; let alone survive should any sort of EMP, Magnetic reversal, or especially solar flare come along.

Last but not least is when you look at how we build, not much will be around in a thousand years(concrete starts deteriorating after about a 100 years), but those old stone ruins from bygone eras more than likely will still be around. That's saying something right there.