More Cold War Gothic: abandoned Soviet missile silo

Think about stumbling across this in a deserted forest.  Late at night, ideally:

What mystery and power the scene suggests, even without knowing the background (assuming it is a missile launch tube).

Then step inside, and down:

And below that:

Maybe it isn't a missile silo.  But, if not, how could anyone who lived from 1945-1990 not think so?
Cold War Gothic: just under your feet.

Just some time ago this was a very secured place and none even has ever dreamed to make civil photos here. Now all the machinery, missiles and equipment were removed and went away in random direction so now no any guards are around and people can make shots of what it was a launch site before.