Yes, this a card from the Bikini Atoll, a Unesco, the only Unesco site on the Marshall Islands. So, this card is a new Unesco site from a new country!! I got it thanks to Emerich.
Bikini Atoll is an atoll in the Micronesian Islands of the Pacific Ocean, part of Republic of the Marshall Islands.
Postcard by PEEM
In the wake of World War II, in a move closely related to the beginnings of the Cold War, the United States of America decided to resume nuclear testing in the Pacific Ocean, on Bikini Atoll in the Marshall archipelago. After the displacement of the local inhabitants, 67 nuclear tests were carried out from 1946 to 1958, including the explosion of the first H-bomb (1952). Bikini Atoll has conserved direct tangible evidence that is highly significant in conveying the power of the nuclear tests, i.e. the sunken ships sent to the bottom of the lagoon by the tests in 1946 and the gigantic Bravo crater. Equivalent to 7,000 times the force of the Hiroshima bomb, the tests had major consequences on the geology and natural environment of Bikini Atoll and on the health of those who were exposed to radiation. Through its history, the atoll symbolises the dawn of the nuclear age, despite its paradoxical image of peace and of earthly paradise. This is the first site from the Marshall Islands to be inscribed on the World Heritage List. - in: http://whc.unesco.org/en/list/1339