Lost city Inca site situated on a mountain ridge above the Urubamba Valley in Peru. Often referred to as the "Lost City of the Incas", it is perhaps the most familiar icon of the Inca World. Machu Picchu was built around 1450, at the height of the Inca Empire. It was abandoned just over 100 years later, in 1572, as a belated result of the Spanish Conquest. It is possible that most of its inhabitants died from smallpox introduced by travelers before the Spanish conquistadors arrived in the area. In 1911, Melchor Arteaga led the explorer Hiram Bingham to Machu Picchu, which
Lost City of the Kalahari Clement had found a geological curiosity, dating back 180 million years to the great upheaval accompanying the birth of the Drakensberg Mountains in South Africa. The stones are composed of dolerite, a particular type of igneous rock which can erode to give the appearance of straight and regular blocks suggesting artificial construction. On 27 January 2016, the Travel Channel aired an episode of "Expedition Unknown" called "Kalahari Desert's Lost City", in which the host, Josh Gates, found man-made walls and rocks with art work in an area that matched Farini's description of the Lost City. Lost City of the Kalahari