If the book said there was a land of brigadoon far to the east of OZ, it'd make me wonder if no one ever found evidence of them anyplace at all.
If the book said there was a city of Bethlehem close by Jerusalem, and I didn't find them there, that'd make me wonder, too.
Guess what....they're there.
Now what are some city names in the Book of Mormon?
If you had read it (twice), you would not have to ask!