They are unlocked at experience level 34.
They are stored in the barn.
Getting map pieces
A sure way to get a map piece is to buy a packet with 14 dia.
Map pieces can also sometimes be found in roadside shops for 1 to 450 coin per piece.
Finally, map pieces can be randomly obtained when players:
- open mystery boxes and mystery packages
- fully satisfy a town visitor
- watch a Night at the Movies trailer