JACKPOT, NEV. It was known for three years as Unincorporated Nevada Town #1 before locals decided that Jackpot had a better ring.
WHY, ARIZ. Located near Organ Pipe Cactus National Monument where two roads form a Y. The U.S. Postal Service wouldn't recognize a one-letter name, so the spelling was changed to Why.
CHICKEN, ALASKA When the town incorporated in 1902, local miners decided to call it Ptarmigan, after what is now Alaska's state bird. But no one could spell Ptarmigan, so they settled on Chicken.