The way they did the stonework for things like this is really cool.

If you’re a total nerd, or just like rabbit holes, please enjoy this long detailed article: https://www.earthasweknowit.com/pages/inca_construction

Often the subject of Ancient Aliens and similar due to the quality of Incan stonework, the documented reality from the Spanish was that the Inca were simply ably to mobilize large amounts of workers to temporarily work on these projects. Tools were pretty advanced, with hardened bronze and sophisticated rope work. But this was all a combination of good engineering, good management, and good craftsmanship.

The article above goes into the details 100x better than I ever could, it is so worth reading!