Fixion: Sperrgebiet; premise.

The Sperrgebiet (German, meaning "Prohibited Area"), also known as Diamond Area 1, is a diamond mining area in south-western Namibia, in the Namib Desert. The Sperrgebiet extends 60 miles inland, and its total area of 10,400 square miles, makes up 3% of Namibia's land mass, though actual diamond mining only takes place in 5% of the Sperrgebiet, with most of the area acting as a buffer zone. Members of the public are banned from entering the area.