While there isn't nearly enough unique landmark stuff like this, the stuff they do have (Verdant Drop, Gelmorra Ruins, Moonspore Grove, Goldleaf Dais) are completely unused thus far. I'm sure plenty of it is inevitably lost to the sands of Tanaka. One thing I did notice is three amber stone-like objects (same color as the stone in the cave for the DRG quests) in some corner by Fallgourd Lake... they vaguely look to be the shape of Tonberries (IMO). I managed to get up to Gelmorra Ruins once somehow, and all around the circular ruins are those same amber stones.
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