Exploring begins here, at a little gap, where one can fall down to the lower level:
You’ll find yourself WITHIN the corner of the wall and in front of a small slope.
Now you must jump up that slope. - Sounds easy but you should have as much speed as possible (veterans boots, travellers trousers and legendary cloak would be useful):
Once up there, next steps are quite easy. Because you are now UNDER the palace floor you can walk straight forward until you reach free space:
The Palace of Aiji seen from the back:
From here you can begin to explore in any direction:
Entering the ancient city:
Lemurian architecture all around:
High Oracle Youji standing on the other side of the broken bridge:
Be careful not to get trapped: Some buildings have no exit. - Only Path of Asura can get you free (or you have to wait until the instance resets):
I wanted to reach the waterfall far above the canyon (the place marked with an X):
… I have come that far:
Later I started a new expedition, taking another way and finally reaching my objective.
But that’s another story.