" I mean, everything is a product of the current civilisation"

Wow. You might want to check history again, or you have a very broad(to the point of meaningless) definition of civilisation.

Anyway, some other point: I for one enjoy certain old ruins much more, than most modern buildings. And even though I would like to see them in their former glory, I know that in most cases this would be increadibly hard, or just impossible, unless you just want a cheap movie requisite.