A photo of Amsterdam canal locks, free download; sluice doors in the reflecting water of the historical canal Nieuwe Vaart, with Autumn tree leaves. The locks are stil an important part of the water infrastructure in the city. Fons Heijnsbroek, street photography of The Netherlands 2018 in high resolution; free image CC0.
<a href="//commons.wikimedia.org/wiki/User:FotoDutch" title="User:FotoDutch">Fons Heijnsbroek</a>
<span class="int-own-work" lang="en">Own work</span>