Indeed there are many historical structures, the construction of which can't be explained by any technology we know.
Yet conventional (profit driven) science dismisses this as "Not evidence".
The evidence is all around us, but we don't see it, blinded by our thinking that everything has to fit within a framework of being driven by profit, which itself is dependent on all energy used by humanity coming from a mathematically negative (destructive) source, which can only be Earth-bound.
In this sense we are actually quite primitive, and are destined to end as such, very soon, if we can't ditch our obsession with profit.