North and South America. Two continents of immigrants: The first peoples came from Asia on foot, via the Siberian-Alaskan land bridge. Then the vikings found Canada and didn't do very much with it. Then
Christopher Columbus tried to reach
India by sailing West, and landed in the Caribbean instead.
Hilarity Ensued.
If you're looking for the country that's frequently referred to as "America", that's
The United States.