What if Inca Tupac Yupanqui had gone further... chroniclers reported him sailing to two islands far away in the Pacific ocean, using Peruvian coastal vessels, in a trip that lasted about a year... Of course he wouldn't have made it to Europe, but at least to continental "Old World".
Note: It's long. And it's here:
http://web.mac.com/pierofmorosini/iWeb/Site/Blog/5803D552-1889-40FD-ADF2-F0304607A765.html
(This says some weird things the author thinks about some wise man traveling all around the world, but what I copied here is thought to be true)
This is about the real book. It's in Spanish:
http://www.librosperuanos.com/autores/del-busto.html
"José Antonio Del Busto Duthurburu, one of Peru’s pre-eminent historians and sailors, posthumously published a book in 2006, provocatively entitled (Inka) Tupac Yupanqui - Descubridor de Oceania (Inka Tupac Yupanqui, Dicoverer of Oceania). In it, he persuasively articulates historical, archeological, anthropological and oceanographic evidence to narrate the history of Tupac Yupanqui, Inka Pachakuti’s son, whom, at the head of a great armada of balsas, sailed the coastal currents of Northern Peru into the open oceans to reach Pascua island and the polynesian archipelago of Mangareva and Vinapu. In this latter island - where the locals still today associate the name Topa to that of a powerful leader - one can visit the perfectly preserved remains of a stone-made building that, in every detail, so precisely fits the canons of Inka architecture of the Pachakuti era in far-away Cuzco, it brings the observer to the point of a surrealistic experience. Not a single stone building even approximately resembling Vinapu’s ‘Inka’ edifice can be spotted across the myriad of South Pacific archipelagos for thousands and thousands of miles. The archeological record of these vast areas mostly registers wooden constructions - wood being the true, characteristic, historical, ancestral building material of the polynesian peoples.
When, just a few years before his untimely death, Del Busto Duturbhuru visited Vinapu’s ‘Inka’ building, the experience led him to ask in his posthumously published volume:
Was Vinapu an altar, another sanctuary built by Tupac Yupanqui to honor Wiraqocha?
(...)
I had just remembered the legend of Uho, the beautiful maiden from the Pascua island. The legend tells the story of a marvelous country beyond the line from where the Sun rises, which was governed by Mahuna-te Ra’a - meaning “Son of the Sun”. Gentle, beautiful maiden Uho, offered her body to the love of a sea turtle, under the condition that he would sail her safely beyond the line where the Sun rises, so she could visit Mahuna-te Ra’a’s lands. As she starts her long sea-journey, Uho sings:
It is dark as night
this land,
Mahuna-te Ra’a,
my spouse.
Luminous and clear is my land,
my eyes are yearning
to see it,
Mahuna-te Ra’ a,
my spouse