>>3784109
I make no claims about who built these structures, aliens are I think one of the less plausible explanations. The important point is that we just plain have no clue who made them, how they made them and when. What we do know about them is very confusing. Again, even in 2025 with all our technology we would have a very, very hard time replicating them. We know for example the quarries were a long distance away and everywhere in-between is very mountainous. For us it would mean excavating large roads, so if whoever made these did that, it was so long ago those transport roads completely disappeared. In addition to their size and transportation, we have no clue how they were cut in the first place or shaped into their current form. The hardest metal any culture we know about from there was bronze which can't even scratch granite, let alone cut through it. Today we typically need diamond tipped powerful saws. Even then, cutting pieces of stone this hard and accurately enough that they fit together perfectly with no gaps and no mortar. Again even with today's technology just one of these blocks would be hard to replicate, yet we have found sprawling masses of ruins like that. Not just there, but with similar one scattered all over the world. The very notable thing is always (and you can see it in this pic) the most impressive stone work is on the bottom, meaning it's the oldest.

So indeed, as the topic of the thread asks. The reason this trope of an ancient highly advanced civilization is so prevalent is that there clearly was some kind of highly advanced civilization in the ancient past. We can see the remnants of it, but other than that all we have is vague guesses and that makes the mystery seem even more compelling. Personally I think it was the descendants of dinosaurs who were the first builders, but that's mostly a hunch and I imagine if hard evidence was found of that, most humans would want to bury it.