32 pieces puzzle of the Reunion island (French island in the Indian ocean).
The 3D terrain model was made with Terrain2STL website (http://jthatch.com/Terrain2STL/)
The printing was split in 2 series of 16 pieces.
Start with blue PLA, and change with green PLA.
Color change happens at 5.0 mm layer.
The space between the pieces is quite tight (0.17mm), so a little sanding may be necessary if the first layer is a too wide.
The author hasn't provided the model origin yet.