Heading eastwards the clouds disappear and winter is characterized by dry and cloudless days. Snow line is at about 15,000 ft (5km)

Moray is an archaeological site in Peru. The purpose of these depressions is uncertain, but their depth and orientation with respect to wind and sun creates a temperature difference of as much as 15 °C (27 °F) between the top and bottom. This large temperature difference was possibly used by the Inca to study the effects of different climatic conditions on crops. In other words, Moray was perhaps an Inca agricultural experiment station. As with many other Inca sites, it also has a sophisticated irrigation system.