During a family visit to Montreal, I made a short (2 days) side trip to Churchill, Manitoba, on the shores of Hudson Bay. This is the best place in the world to see Polar Bears, during the period from late October through November. That is because the polar bears congregate near the shore, waiting for Hudson Bay to freeze over. Once that happens they leave for the ice, where they find their food: ringed seals. The viewing is done from huge special vehicles called "tundra buggy". This is the only safe way, because the bears have eaten essentially nothing for the past 5 months, so they are very dangerous. They actively hunt humans and often come very close to the vehicles. Also, if you are lucky you can see mothers with cubs. I did.