Nice work by Bill Rankin over at Radial Cartography. He tries to map out lands that were really uninhabited prior to discovery. You’ll notice they were mostly small islands.
If you like maps and haven’t browsed that site before, you should. Lots of cool projects:
A table of projections:
For the rest of the story: http://chartporn.org/2013/08/14/what-lands-did-europeans-really-discover/?utm_source=feedburner