Successfully complete the indicated task to unlock the corresponding map:

Avery Fields: Examine the well at the top of the Church of
Restoration during your second visit.
Foreign Quarter: Examine the barrel to your left at the start of
the Biruni University stage.
Four Swordsman Spring: Examine the hollowed out tree at the dry
riverbed.
Gillbaris Gardens: Examine the skeleton on the opposite side of
the central tree from the chest in the Timion Vale mission.
Halls Of Atonement: Examine the king's throne in the Royal Courtyard.
Keliask's Tomb: Examine the glimmering tablet on the ground in the
ancient ruins.
Ragnar's Gorge: Examine one of the crates during the mission in
Tolby.
Trivishim's Corridor: Use the second mine cart in Dread to open up
a cave entrance.
Wanderlust: Successfully complete all story and optional battles
two times.