Where have you found out this photo Patrick …
There is a mountain crossing BG from west to east which parts the country in 2 – North BG and South BG – it is the Balkan – mountain, naming all the region. There is a pick in it – Buzludja – it is connected with our history – there was a final battle there between little but experienced revolutionary group and Turk army 1868. All the guys were killed.
1891 a group of washed minds established BG Communistic Party on the same pick – so this place has an emotional meaning for communists. They built this building on the top in the middle of ’70 intending to do there their congresses, but after changes, they leaved it.
Because of its shape, we called it “Non identified flying object” with toooooooo much love ….