We completed the quest in the immaculate cavern (entrance is in northern Lucella, had to configure weights on the puzzle, etc.). But we decided to revisit and see if we missed anything. Just east of the entrance, near the falls, we can see what looks like a waypoint shrine, though it is labeled a "transporter". We can't figure out anyway to reach it. It seems cutoff from the rest of the dungeon.
Any clues?