Border control is the implementation of border controls on travel between Svalbard, which maintains a policy of free migration as a result of the Svalbard Treaty (Norwegian: Svalbard-traktaten; ) and the Schengen Area, which includes the rest of Norway. The Kingdom of Denmark also maintains a complex system of subnational countries with autonomous customs policies, since they aren’t within the European Union like the Danish mainland. These are Greenland () and the Faroe Islands (). These areas do not maintain strict immigration controls with the Schengen Area, but border controls are sporadically enforced for customs purposes. Other examples of effective internal border
Greenland set out in ships to explore an icy land known to lie to the northwest. After finding a habitable area and settling there, he named it "" (translated as "Greenland"), supposedly in the hope that the pleasant name would attract settlers. The "Saga of Erik the Red" states: "In the summer, Erik left to settle in the country he had found, which he called Greenland, as he said people would be attracted there if it had a favorable name." The name of the country in the indigenous Greenlandic language is ("land of the Kalaallit"). The Kalaallit are the indigenous Greenlandic