The presence of ‘unintentional landscapes’ invites reflection on the difficulties in defining marginal or interstitial spaces, or indeed the concept of landscape itself. In some cases, so-called wastelands or terrain vague have been appropriated as spaces of adventure, creativity or discovery. In other cases, these anomalous spaces have been the focus of anxiety or disdain, or simply erased on account of their putative ‘emptiness’ to make way for more lucrative forms of land use. In recent years, however, fragments of spontaneous nature have been incorporated into landscape design, or even mimicked through the adoption of a ‘wasteland aesthetic’. Marginal spaces appear to transcend existing Eurocentric circuits of landscape discourse by offering multiple meanings and manifestations. Indeed, the cultural and scientific interest in these spaces lies precisely in their complexity and uncertainty.