From what I could research, mostly comments on travel and hotel sites, it is an extremely obscure relic of the war, even the locals had forgotten. It sits in a sort of reflective pool amidst an old apartment complex.
I was far more bothered by the play/performance part, where the contestants had to sit through some insipid “Vietnam is great, the glories of socialism will live forever” Communist dogma song.
Yea, it reminded me of this vapid insipid dogma song that children were forced to sing.