Upstream of the old semaphore remains part of the breakwater which, before the construction of the north jetty, made it possible to spread out the waves bounding to the the mouth.
<a href="//commons.wikimedia.org/wiki/User:Dvillafruela" class="mw-redirect" title="User:Dvillafruela">Daniel Villafruela</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>