In the game's second part, Trabia Base (on the Lindblum/southeastern continent) hosts new treasures and enemies deep within. Optional dungeons like Sodden Depths (north of Surgate), Mythril Mine or Clestance Cave might be worth a trip, too. No confirmed locations, sadly, just food for thought. While I discovered all 20 Memoir Pages during my playthrough, I didn't take any notes - I should have known I would regret that.