During industrialisation, the Seseke – a tributary of the Lippe – was straightened, dyked, and turned into an open sewage canal. Between the 1980s and 2014, the Lippeverband restored the watercourse to its natural state as part of the "Seseke Programme". This transformation was accompanied by an intercommunal art project entitled "Über Wasser gehen", which took place on the river and its tributaries as part of RUHR.2010. Eleven artworks dealing with the ecological improvement of the river landscape and the restoration of nature have remained on the banks, which are now green again. It is possible to view them on walks and cycle tours between Lünen and Bönen. This volume introduces those works and offers a visual tour of the Seseke landscape. It also explores the interweaving of art and nature, and investigates the significance of art for ecological contexts.