Flight over Hudson Bay, a marginal sea of over 1.20 million km² connected to the Atlantic Ocean via Hudson Strait.
Hudson Bay has a tundra and taiga climate. In winter, the bay is iced over; it is also called the ice cellar of North America. However, due to global warming, the ice is thawing earlier and earlier, which is becoming a threat to polar bears, as one of their main food sources, seals, is only accessible through the frozen Hudson Bay.

PiP1: No, these are not swimming beaches, these are environmental sins from oil sands mining Oil sands are indeed an important source of petroleum. But the mining of the oil-water-sand mixture and the extraction of the oil are very harmful to the environment and the climate and leave highly visible traces.