In 1536 while exploring lands north of Mexico, an explorer named Alvar Nunez Cabeza de Vaca claimed that he had found seven cities made of gold. At first Coronado did not believe these rumors but then came more claims that there were seven cities of gold. In 1540 the Vicery of Mexico sent Coronado (and a group of men) on an expedition to find the seven cities of gold. In October of 1540 Coronado and his men returned from the expedition empty handed. The group decided to split up to find other treasures, some of his men discovered the Grand Canyon others discovered the Colorado plateau.