The hospital is a special poi only found in navezgane, sorry
2 big factories are always spawned in main hub cities. Smaller hubs and three-ways can spawn them as well. Unless there's a special factory in navezgane I've forgotten about? It's been a long time since I played that map.
There is a prison type poi for consoles. It's surrounded by concrete walls, has 2 watch towers and several structures. Munition boxes are located there. I guess it always looked like a prison to me. An army encampment doesn't usually have the resources or time to make cement walls.