[TXnMA]

By "bigger than the Great Pyramid", do you mean

1) in height?

2) in volume of stone?

3) in ground area (footprint)?

I'm moderately familiar with central & south American prehistoric structures; they built some amazing things!

So, to what site(s) are you referring?

And, are the "pyramids" of stone -- or, some other material?

[PIF]

Read that some time back do not remember where or even when.