Spread over an area of at least fifty hectares, PIKILLACTA, or “The Place of the Flea”, was built by the Huari culture around 800 AD, before the rise of the Incas. Its unique, geometrically designed terraces surround a group of bulky two-storey constructions: apparently these were entered by ladders reaching up to doorways set well off the ground in the first storey – very unusual in ancient Peru. Many of the walls are built of small cut stones joined with mud mortar, and among the most interesting finds here were several round turquoise statuettes. These days the city is in ruins but it seems evident still that much of the site was taken up by barrack-like quarters. When the Incas arrived early in the fifteenth century they modified the site to suit their own purposes, possibly even building the aqueduct that once connected Pikillacta with the ruined gateway of Rumicolca, which straddles a narrow pass by the road, fifteen minutes’ walk further south.
This massive defensive passage, RUMICOLCA, was also initially constructed by the Huari people and served as a southern entrance to – and frontier of – their empire. Later it became an Inca checkpoint, regulating the flow of people and goods into the Cusco Valley: no one was permitted to enter or leave the valley via Rumicolca between sunset and sunrise. The Incas improved on the rather crude Huari stonework of the original gateway, using regular blocks of polished andesite from a local quarry. The gateway still stands, rearing up to twelve solid metres above the ground, and is one of the most impressive of all Inca constructions.