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
Machu Picchu was featured prominently in the film "The Motorcycle Diaries" (2004), a biopic based on the 1952 youthful travel memoir of Marxist revolutionary Che Guevara. The "NOVA" television documentary "Ghosts of Machu Picchu" presents an elaborate documentary on the mysteries of Machu Picchu. Contemporary multimedia artist Kimsooja used Macchu Picchu as the primary setting for the first episode of her film series "Thread Routes", shot in 2010. The song "Kilimanjaro", from the South Indian Tamil film "Enthiran" (2010), was filmed in Machu Picchu. The sanction for filming was granted only after direct intervention from the Indian government. Machu Picchu is visitable