The latest Iwata Asks is full of information that all Zelda fans will dig. On the last couple of updates, the group talking with Iwata whipped out some of the original concept art for The Legend of Zelda for the original Nintendo. The images include a world map, design outline, a dungeon and more.
The interview is a real treat as Iwata is so surprised to see these original documents are still around. It's also really surreal seeing these images. They are just like something a kid would make to help them memorize all the key points in a Zelda game.
Iwata Asks: Zelda Handheld History [Nintendo UK]