At Travel + Leisure’s World’s Best Summit, the actor opened up about his love of the Scottish Highlands, his life in New York City, and the destinations he can’t wait to revisit.Alan Cumming and Jacqui Gifford behind the candy bar at Travel + Leisure’s World Best Summit London.Credit: Jisette Baquet/Travel + LeisureIt’s a pretty remarkable thing to be responsible for a massive wave of tourism to your hometown. But for actor Alan Cumming, it’s al…