12. Montreal, Canada
In 1976, the Summer Games in Montreal appeared to run smoothly. There were no political demonstrations (or horrific terrorist attack, as had been the case four years earlier in Munich). From an administrative standpoint, the Games were kind of a disaster though, costing the city more that any other Olympic competition for more than thirty years. This was where 14-year-old Nadia Comăneci of Romania scored seven perfect 10.0s (the first time that ever happened – the scoreboard wasn’t even prepared to handle that three-digit number).