Dry stone from the arable or cultural land. They serve both as cattle/sheep fences and the lot's borders. Sometimes also the dry stone terracing is apparent, often combined with parts of stone masonry (house foundations and shed walls) that are held together by a clay-cum-needles "composite" mortar. In Peru in the 15th century AD, the Inca made use of otherwise unusable slopes by building dry stone walls to create terraces. They also employed this mode of construction for freestanding walls. Their ashlar type construction in Machu Picchu uses the classic Inca architectural style of polished dry-stone walls of regular shape. The Incas
Salcantay word meaning wild, uncivilized, savage, or invincible, and was recorded as early as 1583. The name is thus often translated as "Savage Mountain". Directly to the north of Salkantay lies Machu Picchu, which is at the end of a ridge that extends down from this mountain. Viewed from Machu Picchu's main sundial, the Southern Cross is above Salkantay's summit when at its highest point in the sky during the rainy season. The Incas associated this alignment with concepts of rain and fertility, and considered Salkantay to be one of the principal deities controlling weather and fertility in the region west