Leninsky Avenue ("Leninsky prospekt") is a major avenue in Moscow, Russia, that runs in the south-western direction between Kaluzhskaya Square in the central part of the city through Gagarin Square to the Moscow Ring Road.

К-3 was a project 627 "Кит" (kit, meaning "whale"; NATO reporting name "") submarine of the Soviet Navy's Northern Fleet, the first nuclear submarine of the Soviet Union.