Marco Polo claims to have been to Yunnan during his time in China. Here we list a few books that discuss his travels.

J. W. Haeger:

Marco Polo in China? Problems with Internal Evidence

Peter Jackson:

Marco Polo and his 'Travels'

More doubts about the journeys in this inconclusive article.

Henry Yule:

The Book of Ser Marco Polo: The Venetian Concerning the Kingdoms and the marvels of the East

Hans Ulrich Vogel:

Marco Polo Was in China: New Evidence from Currencies, Salts and Revenues

New Evidence from Currencies, Salts and Revenues

Book Cover Image

Abstract: In Marco Polo was in China Hans Ulrich Vogel undertakes a thorough study of Yuan currencies, salts and revenues, by comparing Marco Polo manuscripts with Chinese sources and thus offering new evidence for the Venetian’s stay in Khubilai Khan’s empire.

Frances Wood:

Did Marco Polo Go to China?

And even if Marco Polo went to China, did he come to Yunnan? That is of course the question that would interest us here. Well, all the points Wood makes apply even more to Marco Polo's trip down to the very fringes of the Chinese empire and beyond. As remote and unexplored Yunnan was at his time, Marco Polo's account of Dragon, People with Golden Teeth and the salt mines, together with implausible dates and travel times seems much more a second- or third-hand account written up far-away rather then first-hand experience. Even if Marco Polo went to China, he did not come to Yunnan.