Dream or reality?

I began walking down the hall, looking around for clues to find out why I knew this place. While everything seemed real, I had a nagging feeling in the back of my head that I shouldn't be here. Ignoring that feeling, I continued walking forward, searching for an answer. The strange feeling returned as I knew where everything was in this hallway.

I knew how to navigate my way out of here, but I felt like I would miss something if I left now. I continued walking while looking around, and I felt like this place shouldn't be this empty. It should have been filled with people. Looking around at the walls, I recognized some paintings and sculptures.

I walked until I was at the end of the hallway. I knew that the exit was behind the door on my right, but the door that stood there was something that I didn't recognize. It was out of place and didn't feel like the reason I was there, so I slowly opened the door to see what was behind it.