Buckminster Fuller's Dymaxion Projection (http://en.wikipedia.org/wiki/Dymaxion_map) maps the world onto an icosahedron, creating a 'one world island'. This model, presented in single and dual extrusion STLs, provides a unique world map. The OpenSCAD file (rough around the edges,) is provided for ongoing customization.
Be careful to scale the model down to the proper size for your printbed.
I'm still working on the foldable version, stay tuned!
I took a JPG of the land for the world into InkScape and exported it to OpenSCAD. I created the triangles and triangle borders in OpenSCAD and merged them together.