[aruanan]

You would not notice earth works and foundation remnants - few people do.

I remember reading about how folks were going on and on about the pristine South American rainforest, existing untouched by human hands since the dawn of time and being dumbstruck when it was revealed that all that area had been extensively cultivated and settled.

[Destro]

There seems to have been an extensive network of settlments that were wiped out by European origin deseases - ( maybe now Chinese origin plagues? ) before White men set foot on the Amazon.