Welcome to Churchill, Canada—the "Polar Bear Capital of the World". Here, bears wait for Hudson Bay to freeze so they can start hunting for seals, their primary food source. This migration transforms the town into a prime destination for wildlife enthusiasts. Despite their unwieldy size, these marine mammals are remarkably good swimmers, with some individuals covering over 150 kilometres in a single swim. With their thick fur and a generous layer of fat, polar bears perfectly adapt to cold environments.