It's full of graffiti, and not the kind that's art. It's badly kept and whoever is the operator clearly isn't interested in it anymore (note how all the stickers are put on above the graffiti). It isn't even particularily beautiful. But still, isn't it cute, how this ancient semi-streetcar still makes it's way through the streets of Rome despite all odds?
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You can never take the same picture twice.
Aren't you curious?