The forbidden ancient city Machu Picchu was a lost city for more than 100 years. It was believed that the city remained unknown to the world until July 24, 1911 when Yale professor Hiram Bingham III discovered the ancient Inca city. This day is marked in the history as the “Discovery Day of the Ancient Inca City Machu Picchu".

On 24th July, 2011, Peru celebrated the 100th anniversary of the date -- though just how much of a "discovery" was being celebrated is a long-standing matter of debate.

Most of the scientists are not unanimous with this fact that Bingham was the first person to discover the ancient city during his jungle rides. According to them, the city was known to others long before him. The imperial city, located at 7,900 feet, was probably first found by a Peruvian explorer. Some even argue that two Germans, a British and a Frenchman accessed the site before Bingham did.

The real history of Machu Picchu is still shrouded in mystery, there are lots of mists relating to its establishment, and some said it was a sacred religious site while to others it was an Imperial winter retreat.

One of the seven wonders of the world Machu Picchu “The Lost City of the Incas" attracts a capped number of 1,800 visitors a day.

Take a look on the ancient historical Incas city of the world: