Yarn Store Recommendations

So…anyone out there have any thoughts on yarn stores that should not be missed in New York?  I’m going to be in Buffalo and Corning in the next little while, and would love to know of any great stores in the area.  I’m trying to be a clever kid and ask a bit before I go, as opposed to the morning I head out.  Doing it that way more or less guarantees I won’t have internet access and will miss all the helpful suggestions.  I have a feeling this approach is much better!