Black Widow U475, Soviet nuclear submarine. We discovered this, moored between normal leisure boats, while lost near Rochester harbour. Apparently very active during the cold war, she was open to tourists for a while in the UK. I guess Stalin would be turning in his grave to see this - parked so peacefully and forgotten in England. After searching the web (seeing the old Soviet flag on it really got our interest) we found this slightly outdated site if anyone is interested: http://www.sovietsub.co.uk/home.html