Mustang
From Tatters of the King
Mustang is an obscure former kingdom in Northern Nepal. Its culture is Tibetan and it is dominated by the Kali Gandaki, the world's deepest river gorge. Few, if any white men have ever been to Mustang.
It is the likely destination of Malcolm Quarrie's 'Pilgrimage of Grace' and it contains a place, or feature called Drakmar which is apparently significant in relation to the King in Yellow.