The City of Skulls

Conan remains in Turanian service for about two years, becoming an expert horseman and archer and traveling over the immense deserts, mountains, and jungles of Hyrkania, as far as the borders of Khitai.
One such journey takes him to the fabled kingdom of Mem, a comparatively unknown land between Vendhya to the south, Hyrkania to the north and west, and Khitai to the east.