Agricultural or urban derelict lands can be considered as a split, a gap in a territory or a society. Both derelict lands are associated to a process of abandon and land management. Moreover, both derelict lands can be questioned as lost or future resources according to an economic, ideal, symbolic or spatial value. In that sense the following question can be considered as the main guideline of our thought : as abandoned and awaiting territories, can derelict lands be considered as the witnesses of the way a society manages its changes ? This article aims to analyse agricultural and urban derelict lands changes processes as to prove that urban and agricultural derelict lands can not be distinguished by the nature of their previous activity but by their localisation, their visibility and the stakes they are linked to. As derelict lands have more often been analysed according to their nature, this paper brings another regard on the process of abandon and management which can be helpful for research and professional interdisciplinary.