Hatun Rumiyoc is a paved street lined with impressive walls of polygonal stones. Towards the middle of the street, a group of children and adults dressed up as Incas seem to be laying siege to the famous 12-cornered stone, a polished monolith, cut in such a manner that it fits the other stones without requiring mortar. This 12-cornered stone is however far from remarkable and the Incas were fully capable of working with much more irregular stones.