North America is one part of the continent of America, lying entirely within the Northern Hemisphere and almost entirely within the Western Hemisphere. It borders the Arctic Ocean, the Atlantic Ocean, the Pacific Ocean, Central America and the Caribbean Sea. It is the third largest continent by area, after Asia and Africa, and the fourth largest by population, after Asia, Africa and Europe. North America consists of Canada and the USA. Its highest point is Denali in Alaska. As people from all over the world moved here during the last few centuries, North America has the most multicultural places in the world, mostly in larger cities such as New York and Toronto.