Did you know that Machu Pichu is made up of strong stone call granite? It is very strong and can fix together easily. Then the people (Incas) who is from Machu Pichu left the city. But then somebody found the place. The person who found the place was Hiram Bingham. He discovered the lost city of the Incas.
Website : http://www.fieldmuseum.org/machupicchu/
