I have been living in China now for nearly 5 years. One of the first books I bought when I first came was a copy of Marco Polo's Il Milione. It made interesting reading on one long train journey I took to Inner Mongolia. On the return journey I subsequently lost the book. Today, I happened across an audio version of the book which I yet again enjoyed. I remember hearing and reading many debates about whither he really did make the journey to China or whether it was in fact a collection of other travelers stories, hearsay and myth. This is an old debate starting with the title of Il Milione, in reference to the many supposed lies in his book.
Many of the arguments against are based on misinterpretations of history, such as why did Marco Polo not mention the Great Wall — simply because much of it hadn't been built yet and the old parts would have been 1300 years old and not recognizable as a wall.
Is there any decent evidence that Marco Polo didn't go to China or proof that he definitely did go?