The United Kingdom, also called the U.K., consists of a group of islands off the northwest coast of Europe. It is a unique country made up of four nations: England, Wales, Scotland, and Northern Ireland. England, Wales, and Scotland also make up Great Britain.
Much of the north and west of the U.K. is covered in high ground, knife-edged mountain ridges separated by deep valleys. This terrain was shaped in the last Ice Age, when thick glaciers covered the land.