Beauty is in the eye of the beholder and, to some extent, fame is too. What qualifies a ski run to be one of "the world's most famous" largely depends on where you are in the world and what you consider "fame." If you live in North America, you'll have a different list from people living in Europe -- and even living in a particular state or province will give you a differing perspective.
My travel bucket list just got really long because I stole my friend's and added a few of my own to it. Just this past winter, I was on a women's ski trip and met a new friend from Toronto. We were talking about travels and she told me she had a travel bucket list. I loved that she had it on her iPhone. I asked if she minded sharing it with me and so she did.