This episode explores some of the world’s largest protected wilderness areas, from Northeast Greenland National Park and Alaska’s Wrangell–St. Elias to the deserts of Namibia, the wetlands of Australia, and the forests of the Amazon. It highlights the extraordinary biodiversity these parks support, including polar bears, musk oxen, elephants, jaguars, and countless lesser-known species. The episode also examines the importance of Indigenous knowledge, wildlife corridors, scientific research, and responsible tourism in protecting these vast ecosystems. Ultimately, it shows that the largest national parks are more than scenic landscapes—they are essential refuges for biodiversity, climate stability, and the long-term health of the planet.