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Message: <blockquote data-quote="locustella" data-source="post: 2674485" data-attributes="member: 26257">Greenland is so large teritory, but it is almost never included in such checklists. Actually western part of Iceland belongs geographically to North America. The X-XIIIth century Icelandic parliament (Alþingi) was situated on the continental divide. But such list would be not very useful, because telling abou North America we have in our heads US+Ca, and even with teritories not belonging to the continent, like Hawaii.Actually maybe checlist of Viking lands could be interesting (Greenland, Iceland, Scandinavia, maybe Britain). Or very North Atlantic.Greenland itself is like continent.Sometimes such geological borders are artificial in the world of nature. For example attaching western Iceland to the Norh America doesn't make sense. On the other hand geological borders can be extended to political borders. Omitting Hawaii, Puerto Rico, maybe even for example Guam in case of North America or Canary Islands, Madeira, Azores, Greek part of Cyprus or even Spanish teritories in northern Africa in Case of Europe would tear apart area integral for people.So we have:- geological areas, tectonic plates- biogeografical and- political areasObviously most important is biogeography.</blockquote>