Dangerous airfield in Nepal ?

Hi all,
I seem to remember seeing a strange airfield sometime ago, in Nepal I think, basically its just a hole in a mountain wall, can anyone tell me if they have seen such a place and if so, where it is, thanks in advance.
I seem to remember seeing a strange airfield sometime ago, in Nepal I think, basically its just a hole in a mountain wall, can anyone tell me if they have seen such a place and if so, where it is, thanks in advance.