Often condemned as the icons of the failure of an economic or political model, or as the visual traces of fraud and corruption, unfinished urban planning projects can also support artistic or symbolical reappropriations. Those initiatives show that the unfinished is not the end but a transitory state in the history of an urban planning project. The idea of “unfinished” allows examining the causes of a failure, either temporary or definitive, of an urban planning project or of a policy, and in the same time studying the possible recycling, future symbolical, political or commercial revalorizations, sometimes many years later, of that project or policy. The unfinished continue to nourish the imaginary, to influence the local initiatives, to motivate policies and to produce territories.