On this day in 1911, American historian Hiram Bingham III re-discovered the ‘Lost City of the Incas’: Machu Picchu. Machu Picchu is a 15th Century Inca estate built for emperor Pachacuti and is located in the mountains of Peru. The site lay largely undisturbed for hundreds of years, with only locals knowing of its existence. However, with Bingham’s re-discovery of the site it became known to the wider world. He took artefacts from the site to Yale University for examination and only recently has the university agreed to return them to Peru. Reconstruction work began and the site has become a major tourist attraction.