Just to warn you: this is a very long post with a lot of images. If you’re currently out of patience or time, you should bookmark it and read it when you have more time.
A good way to see Belgrade is by tram. There’s the famous line 2, which circles around the city center, and the “Tram called Belgrade” reserved for tours, with audio guide, etc. The first one is part of the regular transportation system and costs about 50 dinars, while the second one is free but you got to book it in advance. They have pretty much the same route.
