Wikipedia
Nordostrundingen (corrupted from which means Northeastern rounding, in English Northeast Foreland), is a headland located at the northeastern end of Greenland Island, a part of the Northeast Greenland National Park.
At 11°19'W it is the most easterly point of land relative to either of the Americas (North and South America). Nordøstrundingen is further east than three countries in Africa and even further east than the westernmost point in Europe, if Iceland, which is on the Mid-Atlantic Ridge is considered part of Europe. It is only 1° 49′ from the westernmost point of the European mainland which is in Portugal.
Greenland is not part of North America politically, which leads some people to assert that the most easterly point of the continent is the easternmost point in Canada − Cape Spear located at 52°37'W near St. John's, Newfoundland. However, both of these headlands are located on islands on the North American continental shelf; neither is located on the continental mainland.
Semisopochnoi Island, Alaska is in the eastern hemisphere at 179°46'E and thus is the easternmost point in North America by longitude. Cape St. Charles on the Labrador Peninsula is the easternmost point of continental North America.