The Moray terraces are one of the most visually striking and intellectually compelling Inca sites in the Sacred Valley. Three large natural sinkholes have been transformed into concentric amphitheatres of agricultural terracing, each ring a little lower and a little warmer than the one above it. The engineering is quietly astonishing: the terraces are precisely graded, connected by internal drainage channels that prevent waterlogging, and lined with retaining walls of fitted stone.
What makes Moray distinctive among Inca sites is the hypothesis behind it. Most Sacred Valley ruins are ceremonial or defensive. Moray appears to have been a research station — an agricultural laboratory designed to simulate dozens of different growing environments in a single place. The Incas grew crops from sea level to high altitude and needed to understand how each would perform in different conditions. Moray gave them that data in one location.
The site sits at around 3,500 metres and the light on the terraces in the morning is exceptional. Arrive early to have the place to yourself, before the tour groups arrive from Cusco. There is a small entrance fee, and the site is well maintained. Allow an hour to walk down into the largest depression and back up.