Explore.org has live video cameras streaming from a Tundra Buggy up in Churchill, Manitoba. Watch carefully to spot wild polar bears in the tundra. It should go without saying, you need to watch during daylight hours (in Churchill - approx 8am-4pm Central Time).
I haven't made it up to Churchill yet to photograph polar bears, but it's on my bucket list. This just makes me want to go even more!