Whistler

Whistler needs 3 days: the Peak 2 Peak Gondola, connecting the summits of Whistler and Blackcomb with the longest unsupported span between two mountains in the world, on one, a Ziptrek Ecotours forest zipline tour on another, and skiing or mountain biking at the Whistler Bike Park on the third. December-March is best for skiing; June-September for summer activities. It's expensive, one of the most exclusive mountain destinations in North America. Co-host with Vancouver of the 2010 Winter Olympics, it's North America's largest ski resort by skiable terrain, with twin mountains offering the continent's greatest continuous vertical drop.