What part of the Assabet River National Wildlife Refuge was formerly used as a dumping ground by the Natick Laboratories until the 1980s?
Fort Devens-Sudbury Training Annex The Fort Devens-Sudbury Training Annex was a former annex of Fort Devens that was operational from 1942 to the 1990s. It originally opened as an ammunition dump for the base, and old railroad lines and bunkers can still be seen in the area. It then functioned as a dumping ground for the Natick Laboratories until the 1980s. In the 1990s, the site was cleaned up and turned into the Assabet River National Wildlife Refuge.
Thelon Wildlife Sanctuary The Thelon Wildlife Sanctuary, at 52000 km2 , over twice the area of Belgium, is the largest wildlife refuge in Canada. It is located in northern Canada's Arctic region, north of the tree line, straddling the Northwest Territories and Nunavut, halfway between Baker Lake and Yellowknife, and bordered on the north between the Baillie River on the west and the Consul River at the east by the Back River. It is the namesake of the Thelon River, whose river valley is resplendent with boreal forest biological diversity, hence its identification as a "Biological Site of Universal Importance" by the International Biological Program (IBP) in the 1960s.