Casemate with mysticue equipment

Also there was a timid suggestion that this may be the cooled body of super-amplifier of secret radio station whose rusty antenna towers still protrude above the abandoned fort. So, maybe we can see a body of mighty multiresonator klystrons by which Soviet Union carried the truth about socialism to all countries on the planet. Or vice versa mute false propaganda of NATO and SEATO. Then of course there were the mighty resonance magnetrons...