The sidings at Penzance station used to extend through onto the quayside of the adjacent harbour. As can be sen by the rust and dips they are seldom used these days.
<a href="//commons.wikimedia.org/wiki/User:Geof_Sheppard" title="User:Geof Sheppard">Geof Sheppard</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>