13.4808°S, 71.9647°W.
Tambomachay is an Inca water shrine four kilometres northeast of Cusco at 3,800 metres elevation, built in the late 15th century during the reign of Pachacuti or Tupac Yupanqui. The site consists of a series of finely built ashlar terraces and niched walls channeling spring water through a system of stone-cut conduits and ceremonial cascades that have functioned continuously for over five centuries. The two principal fountain spouts emerge at exactly the same flow rate from a buried collection chamber and have never been observed to vary in volume even during severe regional drought — a hydraulic balance the original Inca engineers achieved without surviving documentation of method. The name translates approximately as resting place of the cave. Tambomachay is widely interpreted as a royal bathing site associated with water cult ceremony, possibly tied to the cult of the Inca ruler.
The masonry course at the upper niche shows the characteristic Inca trapezoidal opening repeated three times across the wall.