Question about the Baikonur Cosmodrome

Here’s the situation: I am thinking about setting a scene my next novel in the Baikonur Cosmodrome in Kazakhstan, and I need to know some details about it that I can’t seem to find online. I am throwing this out to the masses and hoping someone here knows something beyond the surface detail, since I doubt I am going to be road-tripping to the Kazakh steppes for a look-see.
Here’s what I need to know:
1)Is there any significant portion of the structure that’s built underground?
2)I know they’ve used the Cosmodrome to test ICBMs…did they launch them from launch gantries or silos?

Thanks in advance if any of you guys can help.

Dnepr boosters are currently being launched from silos at Baikonur:

The Dnepr is an SS-18 ICBM converted to civil use.
Hope this helps. :slight_smile: