Final answer:
Grants, a city in the Colorado Plateau, is known for its large uranium deposits, which were significant during the post-World War II era and the Cold War.
Step-by-step explanation:
Grants, a city in the Colorado Plateau region, is known for having large quantities of the element uranium. The area was a significant uranium mining region, particularly during the post-World War II era and the Cold War, when the demand for nuclear materials increased. Although uranium is not explicitly mentioned in the given reference information about the Copper Cities Mines in Gila, Arizona, which showcases crystals of turquoise, pyrite, and quartz, Grants gained prominence due to its uranium deposits.