The Arctic (Land of the Midnight Sun) is the area around the earth's North Pole while antarctic is in South Pole. It includes parts of Russia, Alaska, Canada, Greenland, Lapland and Svalbard as well as the Arctic Ocean.
This is the parallel of latitude that runs approximately 66.5° north of the Equator. Within the Arctic Circle, the arctic Sun is above the horizon for, at least, 24 continuous hours per year, in conjunction with the arctic's Summer Solstice. Likewise, in conjunction with the arctic's Winter Solstice, the arctic sun will be below the horizon for, at least, 24 continuous hours.