Canada occupies a major northern portion of North America, sharing land borders with the contiguous United States to the south (the longest border between two countries in the world) and the US state of Alaska to the northwest. Canada stretches from the Atlantic Ocean in the east to the Pacific Ocean in the west; to the north lies the Arctic Ocean.[81] Greenland is to the northeast, while Saint Pierre and Miquelon is south of Newfoundland. By total area (including its waters), Canada is the second-largest country in the world, after Russia. By land area alone, Canada ranks fourth.[81] The country lies between latitudes 41° and 84°N, and longitudes 52° and 141°W.