I've been there. At the time I was there, I didn't believe they were real. We were told that a big boulder inside pyramid of the Sun gathered spiritual energy and if you touch it, it gives you healing energy. I touched it, nothing happened. The shape of the pyramid of Sun is what seals the deal for most. There are things like paths and walls (pic related, I saw this), but they are in clusters, they could be faked
I personally think they're not men made pyramids.
There's just too much dirt, so it's not a pyramid made of solid blocks. More like hill shaped in a pyramid with clusters of paths and tunnels beneath
Keep in mind, there are also stories about pyramids in
Pyramid Sierra, Urubici, Santa Catarina, Brazil
Gympie pyramid in australia