a photo of the iron drawbridge near Kadijksplein over the water Nieuwe Herengracht, Amsterdam; high resolution image by FotoDutch, June 2013. This water connected the river Amstel with the tide-water IJ and the North Sea, so locks were placed near this bridge: Scharrebier-sluis.
<a href="//commons.wikimedia.org/wiki/User:FotoDutch" title="User:FotoDutch">Fons Heijnsbroek</a>
<span class="int-own-work" lang="en">Own work</span>