Check out this creepy mine portal outside Area 51 in central Nevada! The adit was fortified into the hillside with a cargo container front. The heavy doors could then be closed and locked to keep prying eyes out... or perhaps to keep something in?? This is some mining engineering we've never seen before!!
Watch the full ADVENTURE EPISODE here: [ Ссылка ]
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![](https://i.ytimg.com/vi/p_G_isenXb0/maxresdefault.jpg)