There is no city called Bikini Atoll. Bikini Atoll is a coral reef within the Marshall Islands, located in the Pacific Ocean. It is known for being the site of nuclear weapons testing by the United States between 1946 and 1958. The people of Bikini Atoll were relocated during the testing period and are still unable to return due to high levels of radiation. Today, the area is mainly used for scientific research and is also a popular diving destination.