Reading "The Incas" by Garcilaso de la Vega, a long, dry history of The Inca civilization and it's kings and policies, when I come across a reference to a Gold Chain made by the king Huaina Capac to commemorate the birth of his son, Quotes:
"Inca Inti Cusi Huallpa or Huasca this last word means a chain or rope Tradition relates that to commemorate his coming of age a golden chain was made long enough to go round the great square Cuzco He reigned eight years when he became the prisoner of his brother Atahualpa by whose order it is supposed he was killed in 1533 at Andamarca..."
&&
"... the inca ordered the chain to be made of suficient length to surround the square so that according to the computation of Garcilaso it must have been seven hundred feet in length and so heavy is we may credit the accomptant general Augustine Carate that two hundred Indians could scarcely raise it from the ground After the most diligent search made by the Spaniards this chain could never be found, it was buried with other treasures carefully in the bowels of the earth"
Searching Google for references it appears the chain remains lost.
Links: http://science.nationalgeographic.com/science/archaeology/lost-inca-gold/
Many, many references to the countless treasures that were hidden upon the arrival of the Spaniards, there seems to be enough in the legends to suspect there still await great treasures to be found...