Sofia has a wide variety of Trams and Trolley Buses as well as a metro.
This metro system is very new but disappointingly it is rather slow. It goes 30mph most of the time even though it seems to have power to go faster. Also acceleration is rather slow.
Sofia has some awesome trolley buses. The oldest ones sound amazing.
Sofia has two guages of tram. Some sections of track are of both gauges. There are many types of different tram. Sadly they didn't seem to go very fast. I didn't manage to get a dedicate video of the trams but they can be seen in my cheap flight adventure video