Four Corners (disambiguation)
Four Corners is a region in the southwestern United States where the corners of Colorado, Utah, New Mexico and Arizona meet.
Commonwealth
Four states of the United States officially designate themselves as "commonwealths". All four were part of Great Britain's possessions along the Atlantic coast of North America prior to the formation of the United States of America in 1776. As such, they share a strong influence of English common law in some of their laws and institutions. The four are: