Cannabis October 12, 2016 thcscience_admin River in Germany RahlauLocationCountryGermanyStatesHamburgPhysical characteristicsMouth • locationWandse • coordinates53°34′53″N 10°05′59″E / 53.5814°N 10.0996°E / 53.5814; 10.0996Basin featuresProgressionWandse→ Alster→ Elbe→ North Sea Rahlau is a river of Hamburg, Germany. It flows into the Wandse in Wandsbek. See also[edit] List of rivers of Hamburg