ツァーリ・ボンバ
Sukhoy Nos was a site of nuclear testing for the former USSR, being the third and the northernmost detonating site of three on the Novaya Zemlya archipelago (designated "Zone C"). It was used between 1958 and 1961 and in October 1961 was the site of the record-breaking 50-megaton hydrogen bomb, known as Tsar Bomba.