This small set of ruins sits on a hilltop. It is assumed it was a fort as it commands views of the entire area and its name in Quechua means “Red Fort”. It isn’t as simple as that though as the place is quite small. Perhaps it was more of a guard post.
There are numerous storage areas for storing grain and cereals, it also has some places to sleep.
A guide on the site makes money by telling tourists that the ruins were a school for noblemen’s children – the future rulers of the empire. This is more his personal guess rather than any fact, but shows you have to be careful not to hand money over to random people who say they are a professional guides.