By Douglas Holtz-Eakin
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Independent voices from the TWT Communities
Machu Picchu ( northwest of Cusco and through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for the Inca emperor Pachacuti (1438–1472). Often referred to as the "Lost City of the Incas", it is perhaps the most familiar icon of the Inca World. - Source: Wikipedia

Tourists love the enigmatic Inca citadel of Machu Picchu high in Peru's Andes. They may love it too much. As the country celebrates the 100th anniversary of the rediscovery of the "Lost City of the Incas," archaeologists are warning that a heavy flow of visitors and poor administration of the site are threatening one of the wonders of the world.

Archaeology and geographical discoveries of note from the past 100 years