By Johanna Murphy, World Wildlife Fund

More than 7,000 feet above sea level in the Andes Mountains, Machu Picchu is the most visited tourist destination in Peru. A symbol of the Incan Empire and built around 1450 A.D., Machu Picchu was designated a UNESCO World Heritage Site in 1983 and was named one of the New Seven Wonders of the World in 2007.


In the Quechua Indian language, Machu Picchu means “Old Peak” or “Old Mountain.”


Machu Picchu is made up of more than 150 buildings, ranging from baths and houses to temples and sanctuaries.


The compound contains more than 100 separate flights of stairs. Most of the individual staircases were carved from one slab of stone.


Although many of the stones used to build the city weighed more than 50 pounds each, it is believed that no wheels were used to transport these rocks up the mountain. Rather, it is thought that hundreds of men pushed the heavy rocks up the steep mountainside.


Many theories exist about Machu Picchu’s purpose, from a royal estate to a secret ceremonial center.

Llamas standing at Machu Picchu overlook in Peru. In 2007 Machu Picchu was voted one of the New Seven Wonders of the World.


The Incas were some of the best masons in the world. The structures were so well built with a technique called ashlar (stones cut to fit together without using mortar) that not even a knife blade could fit between the stones.


Machu Picchu was known only locally until Yale professor Hiram Bingham rediscovered the site in 1911. His book The Lost City of the Incas was based on his findings.


A long-standing dispute between Peru and Yale University has existed about the artifacts collected by Bingham during his exploration of the site. Yale maintains that it owns the items, while Peru insists the artifacts were given on loan.


Machu Picchu was an astronomical observatory, and its sacred Intihuatana stone accurately indicates the two equinoxes. Twice a year, the sun sits directly over the stone and creates no shadow.


Unfortunately, most cities built by the Inca civilization were destroyed by the Spanish conquest. Machu Picchu was in a hidden location—invisible from below—and not found, making it one of the most well-preserved Inca cities and an archeological gem.

Visit Machu Picchu with Nat Hab and WWF.