Country: United States Minor Outlying Islands Region: Bikini
Latitude: 11° 31' 30" N Longitude: 165° 33' 18" E
Area use / Military Branches: Closed
Bikini atoll was used extensively by the US forces as a nuclear testsite (1946 - 1959).
The radiation contaminated site is currently abandoned and although the Island has been closed it is therefore still under US army control.
For further information check the Wikipedia "Operation Crossroads" article and others.
Bikini is occasionally - and illegally - visited by sport divers. Danger… radiation!
Search for Bikini Atoll