Bi-directional lock at the end of the <a href="https://en.wikipedia.org/wiki/Marne-Rhine_Canal" class="extiw" title="en:Marne-Rhine Canal">Marne-Rhine Canal</a> in Strasbourg, France
<a href="//commons.wikimedia.org/wiki/User:Ikar.us" title="User:Ikar.us">Ikar.us</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Ikar.us" title="User talk:Ikar.us"><span class="signature-talk">talk</span></a>)
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<a href="//commons.wikimedia.org/wiki/File:Strasbourg_PontTournant_L.jpg" title="File:Strasbourg PontTournant L.jpg">File:Strasbourg PontTournant L.jpg</a>