The zig-zagging megalithic walls of Saqsaywaman

This colossal hardened mound of ancient magma is just opposite the zig-zagging megalithic walls of Saqsaywaman, and it has some of the most insane precision cuts into extremely hard stone from the ancient past that I have ever seen!

Who could have done this and why?! https://x.com/TheProjectUnity/status/1986536351089754221