Machu Picchu - Ruined City of the Incas, Peru (2/418)

At 2,430 m above sea level, on a mountain site of extraordinary beauty, in the middle of a tropical mountain forest, Machu Picchu was probably the most amazing urban creation of the Inca Empire at its height, with its giant walls, terraces and ramps, which appear as though they have been cut naturally in the continuous rock escarpments. The natural setting on the eastern slope of the Andes encompasses the upper Amazon basin with its rich diversity of species.