Churchill is located on the Hudson Bay and for several months annually is an ice-free port. In October, polar bears congregate here by the hundreds on the edge of the tundra. Here they wait for the waters of Hudson Bay to freeze so they can return to the ice sheets and commence hunting seals. For photographers, the view, and the bears, are tailor-made for a dramatic photo. Wapusk National Park is located outside Churchill and is one of the world's largest known polar bear maternity denning areas, offering incredible opportunities for nature watchers and photographers alike. Birdwatchers also find Churchill well worth the trip. During the shoulder seasons, thousands of birds fly over the town on their immense migratory routes, sometimes connecting two continents. There is no highway to Churchill, so visitors must arrive via train from Winnipeg, or by plane.