The fall season ushers in the full spectrum of emotion: mourning for summer’s end, excitement for apple pies, anticipation (or trepidation) for the coming school year—and for most, a healthy dose of nostalgia as we recall jumping in leaf piles, carving pumpkins and traversing apple orchards. And with reduced crowds and milder temperatures, fall is one of the best seasons to enjoy the cultural and natural gems of destinations around the world, from the stargazing festivals of Alberta to the harve...