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
Secret of the Incas return and uses it to fly to Machu Picchu. There he discovers an archaeological expedition headed by Dr Stanley Moorehead (Robert Young) is preparing to enter the tomb where the Sunburst is said to be located. Moorehead becomes infatuated with Elena, while Morgan arrives and coerces Harry into helping him find the treasure. While Morgan is asleep, Harry slips away and enters the tomb, locating the Sunburst hidden inside a hollow pillar. Morgan then appears and grabs the Sunburst at gunpoint before shooting his way out of the temple while being pursued by Harry and a group of locals. Trapping