I think building on the right used to be very grand. I could see old beds and such through the windows, walking along the bridge to the right (which you cannot see in the photo).
Attempted to go to the Modern Art Museum but it was bombed in 1999 and still under repair.
Walking through the park along the Danube.
In the suburb of Zemun. I spent about an hour sitting in the window on the left watching people. It was the only non smoking establishment I found, and I was happy. I don't care if it's a chain in Serbia!