Search for the Lost City of Gold Flamholc. The History Channel summary: "In the 16th century, Spanish conquistadors swept through Peru in search of great golden treasure. But when they stormed the Incan stronghold of Vilcabamba in 1572, they found the city deserted, burned, and stripped of its wealth. Legend says that the Incas had retreated deep into the jungle and built another magnificent city in an inaccessible quarter of the cloud forest. For more than four centuries, explorers, adventurers, and archaeologists have searched for the gold and riches of the Incas. Now, we follow Tahir Shah, who teams up with Pancho, a Machiguenga warrior who claims
Machu Picchu more farmland to grow crops, and to steepen the slopes that invaders would have to ascend. The terraces reduced soil erosion and protected against landslides. Two high-altitude routes from Machu Picchu cross the mountains back to Cusco, one through the Sun Gate, and the other across the Inca bridge. Both could be blocked easily, should invaders approach along them. The site is roughly divided into an urban sector and an agricultural sector, and into an upper town and a lower town. The temples are in the upper town, the warehouses in the lower. The architecture is adapted to the mountains.