“These extensive subterranean halls date back to the early First Era time of Darloc Brae, the “Golden Beast” who conquered all of Anequina. Khajiiti tradition holds that this place was built as a refuge for those fleeing the Golden Beast, but its original name has been forgotten.”
The unsteady ledge that hides our skyshard can be seen from the entrance, as you get into the first main room. It is on your right, next to some stone pillars. However, you can’t climb on it. At least I wasn’t able to. Instead, you have to go left from it, down the path, up the stairs on the right, into the hallway and into the cave to your right shortly after. Follow this path, passing by a large temple on your right, until you reach that very unsteady ledge from the start. I am not sure if the enemies that follow you to this spot have any kind of pushback abilities, but it would be something I would give them as a developer. Be sure to clear them out instead of gambling with the possibility of being pushed back to the start.