Wood Buffalo National Park, located in northeastern Alberta and southern Northwest Territories, is the largest national park in Canada at 44,807 km2 (17,300 sq mi). It is also the largest national park in North America and the second largest in the world. The park was established in 1922 to protect the world's largest herd of free roaming Wood Bison, currently estimated at more than 5,000. It is one of two known nesting sites of whooping cranes.
Photo: Photograph by Wikipedia contributor Ansgar Walk, used under a Creative Commons Attribution-Share Alike 3.0 Unported license