River Eem just north of Eembrugge, between Hilversum and Amersfoort, the Netherlands. Used on<a href="https://nl.wikipedia.org/wiki/Eem" class="extiw" title="nl:Eem">nl:Eem</a> and <a href="https://nl.wikipedia.org/wiki/Zuiderzeepad" class="extiw" title="nl:Zuiderzeepad">nl:Zuiderzeepad</a>. Location is a bit approximate, but not off by more than a few hundred metres.
<a href="//commons.wikimedia.org/wiki/User:MartinD" title="User:MartinD">MartinD</a>
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<span class="int-own-work" lang="en">Own work</span>