South-western end of the 32.5 km <a href="https://en.wikipedia.org/wiki/Afsluitdijk" class="extiw" title="en:Afsluitdijk">Afsluitdijk</a> (completed 1932) near <a href="https://en.wikipedia.org/wiki/Den_Oever" class="extiw" title="en:Den Oever">Den Oever</a> (Netherlands).  The salt-water tidal <a href="https://en.wikipedia.org/wiki/Wadden_Sea" class="extiw" title="en:Wadden Sea">Waddenzee</a> is to the left of the <a href="https://en.wikipedia.org/wiki/levee" class="extiw" title="en:levee">dike</a> and the fresh-water non-tidal <a href="https://en.wikipedia.org/wiki/IJsselmeer" class="extiw" title="en:IJsselmeer">IJsselmeer</a> is to its right. The Stevensluizen (Stevin locks) and 15 discharge sluices are in the foreground.  The Lorentzsluizen (Lorenz locks) and a further 10 discharge sluices are at the far end of the dike.
<a href="//commons.wikimedia.org/wiki/User:MD_van_Leeuwen" title="User:MD van Leeuwen">MD van Leeuwen</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>