(figuratively) A magical place where one goes to find fulfillment of one's dreams.
2000, Clayton R. Koppes, Gregory D. Black, Hollywood Goes to War, Tauris Parke Paperbacks, page 7:
Yet for the vast majority of those who acted on their urges to be in pictures, Hollywood was not the end of the rainbow but the end of the road.
2009, Louis F. Vargas, The Passion Driven Life, Wordclay, page 52:
Money does not buy happiness. It just can buy the nice things that make life easier and a lot more enjoyable, but it can’t get you true happiness --- believe that! It’s not the end of the rainbow many think it to be.
2011, Mark Sircus, Transdermal Magnesium Therapy, iUniverse, page 121:
Magnesium chloride is the end of the rainbow in terms of cardiac care; the only thing in doubt is how many years more will pass before the field of cardiology fully understands magnesium medicine.