Location of Machu Picchu

Machu Picchu is 80 kilometers northwest of Cusco, on the crest of the mountain Machu Picchu, located about 2,350 meters (7,710 feet) above sea level. It is one of the most important archaeological sites in South America and the most visited tourist attraction in Peru.

It is above Urubamba Valley. From atop the cliff of Machu Picchu, there is a vertical rock face of 600 meters rising from the Urubamba River at the foot of the cliff. The location of the city was a military secret, and its deep precipices and mountains provide excellent natural defenses. The Inca Bridge, an Inca rope bridge, across the Urubamba River in the Pongo de Mainique, provided a secret entrance for the Inca army. Another Inca bridge to the west of Machu Picchu, the tree-trunk bridge, at a location where a gap occurs in the cliff that measures 6 metres (20 ft), could be bridged by two tree trunks. If the trees were removed, it would leave a 570 metres (1,900 ft) fall to the base of the cliffs, also discouraging invaders.

The city sits in a saddle between two mountains, with a commanding view down two valleys and a nearly impassable mountain at its back. It has a water supply from springs that cannot be blocked easily, and enough land to grow food for about four times as many people as ever lived there. The hillsides leading to it have been terraced, not only to provide more farmland to grow crops, but to steepen the slopes which invaders would have to ascend. There are two high-altitude routes from Machu Picchu across the mountains back to Cusco, one through the sun gate, and the other across the Inca bridge. Both easily could be blocked if invaders should approach along them. Regardless of its original purpose, it is strategically located and readily defended.