Here it is. This doesn't include the large faces (one on the left and the one on the right. The circle at the top looks like a pair of eyes. It's looking directly at the camera. The blue one is kind of humanoid. The one next to it looks like a cat of some sort to me. The large red one has two faces in it. One is a skull; the other is a monkey. The smaller one below the large red one resembles an alien. I also just noticed that if you step back and combine the two red circles on the left, it almost looks like a unicorn.
By the way, there really wasn't anything in that room. The air was completely clear.
As for the age of the place, I'm not sure when it was built. However, you can find out more about it here.
So, do you see more faces now?