A mule is holding the MS Maasdam, a Holland America Line cruise ship, during a transit of the Miraflores locks in the Panama Canal.  The Miraflores Visitors Center is visible in the background.
<a href="//commons.wikimedia.org/wiki/User:Phil13" title="User:Phil13">Jean-Philippe Boulet</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>