You have the face of a dead man...
But you can't terrify us with your mask,
because it is only a mask.
When you take it off we shall see you as you really are.
When you drop your mask then we shall know you.
-The Incan Waman Pona's Chronicle writen c.1585-1613
The Incans had a sophisticated culture, unfortunatly I believe the Spanish killed the last Heir in the 1600s because of a Rebellion.
I remeber playing Amazon Rainforest 3rd Edition as a child. You had to give the Heir a golden statue so that you could learn where Vilcabama is.
I got a book all about Conquistadors and the Aztecs and Incas.