It might seem strange that tea is practically the official drink of the Canadian Rockies. Usually, trekkers tend to subsist on trail mix and as much water as can be comfortably carried. But visitors to Banff National Park in Alberta, Canada, not only want to climb the glorious slopes, photograph the crystal lakes, and peer at the mighty glaciers. Whether spring, summer, or fall, many set out to visit one of the park’s century-old teahouses. At these two quaint wooden buildings, less than three miles apart, hundreds of tea varieties…