The Rockies
The Rockies are a wonderful area of Canada, with massive national parks (Banff National Park and Jasper National Park). Both parks charge admission for vehicles, even if passing through (if staying for longer than a few days it is probably worth looking at an annual pass). There is little, if any, development permitted here, Banff being the largest town in the area. Lake Louise is little more than half an hour down the highway and is a bit less commercial with the absolutely NOT to be missed Chateau Lake Louise right on the lake. Further to the north, Jasper and Glacier National Park.
The Trans-Canada highway carves directly across the Rockies and passes through Banff, continuing all the way to Vancouver (eventually) to the west and Calgary, just outside of the Rockies, to the east. This is a wonderful ride but I would suggest getting off the highway and visiting some of the areas off of the road.
The “Coquihalla Highway” runs as an alternate (and much faster) route avoiding the Fraser Canyon portion of the Trans-Canada Highway. This is tremendously monotonous but can make the journey a LOT quicker. In winter this highway is particularly dangerous with it's straight, exposed stretches leading to difficult, icy, conditions.
Note: Some of the information found on this page has been provided courtesy of Kindred.