I have published this image as author under the Creative-Commons-Licence CC-by-SA-3.0.. This means that free online usage outside of Wikimedia projects under the following terms of licence is possible:
{{Information| |Description = Estuary of the river Ruhr into the Rhine at Duisburg-Ruhrort, Germany |Source = own photography |Date = 16. Jul. 2004 |Author = ~~~ - Raimond Spekking |Permission = |other_versions = }} {{GFDL-self}}