1) First, the map is huge. It's comprised of 60 pages which are to be arranged in a circle, adding up to a 10 foot by 10 foot map.
2) Second, the map has a unique perspective, looking at the world from the Arctic down. Indeed, the north pole itself is shown as being covered by some sort of landmass, and Canada's Arctic listed as new, unknown lands.
3) Third, it seems, little is known about the mapmaker himself. A quote from the article:
Historians know some basic details about the cartographer who created the map, Urbano Monte (1544-1613), a nobleman who lived in Milan, in northern Italy. When he was 35, Monte married 18-year-old Margarita Niguarda, and they had four sons and one daughter. Because of his family's status and affluence, Monte didn't have to work. Rather, he spent his time collecting books for his renowned library and pursued scholarly interests...It's amazing to me to think of this man of great wealth and leisure choosing to pass his time this way, collecting information about the world and embarking on creating such a massive map. Another fascinating detail is that the mapmaker met with the first ever official Japanese diplomatic mission to Europe. It's wonderful to imagine that scene. In a world where Japanese and Europeans may have been alien to one another, how would they have communicated? What subjects might they have discussed? How would they have regarded one another?
4) Fourth, the mythology of the map is stunning. It's filled with sea creatures, strange beasts and mermaids. Why did the mapmaker include these things? Did he think they were beautiful, was it simply common to have such things on maps, or did a European in the time of the Renaissance truly believe such creatures existed? There are some outstanding images of the map and these creatures here.
5) Fifth, this map takes a political and historic snapshot of the world at the time of its making. It lets us know who the various world leaders are. Tells us about them, shows us where their fleets have reached, all in addition to showing us where their territory extends, not only in lands that were known to Europeans at the time, but also in the Americas, only recently coming under exploration and European settlement.
6) Sixth, and finally, on a personal note, I love how this map depicts some places I know. For example, my home province of Quebec is referred to as the Province of Canada. Quebec City is labeled as Stadacona, it's original name, and my hometown on Montreal is known by its original name, Hochelaga. The Great Lakes do not appear on the map. This awesome site allows you to scroll around and zoom in on the map. I could spend hours...