USA Today Travel: “SAN LUIS OBISPO, Calif. – The Happiest Town in the Whole USA is surrounded by lush hills that at this time of year are so intensely green, they practically sparkle. A refreshing breeze wafts in from the Pacific, just 10 miles away. There’s no need for a car, since the downtown is infinitely walkable. And if you do drive, traffic jams are rare.”