I found info about the "Pyramid" that I mentioned in the above comment! According to this blog by a guy who has hiked to the Everest Base Camp in the past:
"It is a three-story glass, aluminum, and steel scientific research center with the mission of studying environment, climate, human physiology, and geology in a remote mountain area – more formally known as The Pyramid International Laboratory/Observatory"
By the way, this shot of yours is simply stunning!
!LADY