The Winter Games have special requirements that will stop many cities from being able to host the Games.  Ice and Snow prohibit tropical cities, for certain. But a lot of traditionally winter places will be stopped in their tracks because they do not meet the mountain requirement for Alpine skiing...and not just a mountain, but a mountain with a vertical drop of 800 m (or 2625 feet).  Vertical drop being from the top of the skiing area to the bottom, not just the mountain's elevation above sea