Located in northern Manitoba on the shores of Hudson Bay, the small town of Churchill (with a population of under a thousand people), has developed a reputation as the "Polar Bear Capital of the World." One of the best places to consistently catch sight of not only polar bears, but other creatures of the arctic biome, it's worth the expensive plane ride from Winnipeg or a less expensive, but much more lengthy train or car ride (about a day from wherever you may be stationed) to enjoy this unique area. The polar bear population booms during winter, although may still be seen on buggy tours most times of the year in the lowlands, while beluga whales via kayak or boat are a big draw during the summer months. Despite its isolation, Churchill has a tourist infrastructure, and can accommodate you if you plan on staying for a bit.
And why wouldn't you stay when this is one of the best places in North America to be enthralled by the Aurora Borealis (Northern Lights)? Many tours include igloo building, meaning that if you stay during the peak viewing period from December to April you may do so in the same conditions as the Eskimo who have lived under this sky for thousands of years. The included Churchill website can connect you to a number of tour operators, visitor accommodation, and much more!