The area of North America without islands - 20.36 million km ², with the islands of 24.25 million km ². To the islands of North America includes the world's largest island of Greenland (2.176 million km ²). This is a very extended continent, with the full range of natural zones and belts. From north to south and along its entire length runs mountain range with the common name Cordillera. The objects of our attention are at the extreme north and south of this mountainous country. To the north is the highest peak of the continent's Mount McKinley (Denali), and in the south - the highest volcano - Mount Orizaba.