I’m glad to live in one. Here they are according to the Economist
Vienna, Austria
2) Copenhagen, Denmark
3) Zurich, Switzerland (tie)
3) Calgary, Canada (tie)
5) Vancouver, Canada
6) Geneva, Switzerland
7) Frankfurt, Germany
8) Toronto, Canada
9) Amsterdam, Netherlands
10) Osaka, Japan (tie)
10) Melbourne, Australia (tie)
And the other interesting part - not one American City made it . . . .