one wishes to find knowledge or wisdom, they will often climb a mountain (well not
really, but stay with me folks.) In El-Hazard, there are two mountains that one
may climb if they are on a quest for knowledge. Either Mt. Muldoon or Lilicoco Mountain.
In El-Hazard 2, when Fujisawa flees his wedding, claiming he is going on such a quest, Afura determines that this is the mountain that Fujisawa is headed for because he probably wouldn't climb Muldoon where the Priestess, more specifically Miz, live.
However, we never actually see the mountain because both Fujisawa's and the other's quests are all deterred. However, one can assume that the mountain in question is probably located somewhere in the chain of mountains that make up the Holy Mountains of God.