Lost city - MACHU PICCHU - Lost City of Inca

As you all probably know, Machu Picchu is one of the most interesting and surprising places in the world. As you reach this amazing destination you could immediately feel life and history of the Inca Empire.Machu Picchu is constructed around 1460. and it was abandoned less than 100 years later, after Spanish conquest of Peru, in 16th century.There is many interesting facts about Machu Picchu and one of the most famous question is "How such a magnificent site could remained forgotten for 400 years?!?" Is it constructed to be invisible or there is something in Inca culture that we should understand better?!?

We have to admit that it's quite hard to understand from our knowledge of Greek, Egyptian, Roman and other early civilizations with written records how such amazing site could be not found for so long and are we really aware of our past?