Nuristan is the formerly named Kafirstan.
As in, "Which way is Kafiristan, Danny?"
We have slept over the notion half a year, and require to see Books and Atlases, and we have decided that there is only one place now in the world that two strong men can Sar-a-whack. [?] They call it Kafiristan. By my reckoning its the top right-hand corner of Afghanistan, not more than three hundred miles from Peshawar. They have two-and-thirty heathen idols there, and well be the thirty-third and thirty-fourth. Its a mountainous country, and the women of those parts are very beautiful.
By the way, isn't it the northeastern tip of Afghanistan? Wasn't it one of the last areas held by the Northern Alliance in the era of Taliban rule? What are the Islamofascists doing there?