The claim: This area was declared a UN biosphere and is an ideal geographic location for detention facilities. Area is an isthmus extending out from Tennessee, between Lake Barkley on the east and Kentucky Lake on the west. Just scant miles from Fort Campbell in Tennessee.
What it really is: Yes, it is part of the UN biosphere program (the actual name is the "Man and the Biosphere Programme") but the site itself is not controlled by the UN. It is controlled by the United States Forest Service, and is a National Recreation Area, which means it's open to the public.
It should also be noted that it is the last place in the United States that became part of the Man and the Biosphere Programme, and that was in 1991.