The Largest Underground Military Base in The World

Located in Sweden, Muskö underground military facility is the world’s largest underground military facility. Used for the Naval Station.
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Built under a granite mountain, so It’s impossible to destroy with cannon, fragmentation bomb bunker even though the nuclear missiles.
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Musko used to manufacture ships Frigate, Destroyer ships and submarines has the longest pier reaches 350 meters.
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There was a repair ship, hospital, dining rooms, barracks, mall, meeting rooms, etc. All under the mountain.
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There is also hospital. If there is a war thousands of soldiers wounded / injured could be treated inside the hospital with a capacity of 1000 beds reach.
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