Las Vegas
In my office I have a "wall of respect" to one of the greatest chocolate candies the world has ever known, the "M&M". Although the candy is found everywhere, a pilgrimage to the store in Las Vegas is akin to a trip to the Vatican, the West Wall, or Mecca. I'm sure more outlets will be created (I hear Orlando and New York are planned), but no matter how many are built, this will always be oe of the greatest stores ever conceived and delivered.
Thank you Mr. Mars.
Tip: Go to the 3D movie, it is great.