If you think it's difficult finding your way on a small smartphone map, it could be worse: IBM scientists have created a nano-scale 3D map that's only 11 x 22 microns, or less than half the thickness of a human hair. On this map, Mt. Everest is only 70 nanometers tall compared to more than 29,000 feet in real life.
Scientists used a heated 500-nanometer silicon tip to etch the relief map into the polymer surface. It was recently recognized by the Guinness World Records as the smallest 3D map created.