Answer: Alberta, Canada
Dark Sky Canned Foods are free of light pollution for unrestricted recreational and scientific astronomical observations. Of course, there are naturally darker regions throughout the world (a remote island without electric light and no neighbors for hundreds of kilometers is an example of a natural region with a dark sky), but there are certain regions near civilization specially monitored and reported as free from light pollution.
The largest dark-sky reserve in the world is located in Alberta, Canada (part of the reserve also extends to the Northwest Territories). This wildlife sanctuary, Wood Buffalo National Park, is an impressive 1
The park is not only the largest dark sky reserve in the world, but also the park. Thanks to its biodiversity a UNESCO World Heritage Site (it is one of two well-known nesting habitats for the Whooperkran) and home to the world's largest beaver dam (a impressive length of 2,790 feet).