Ship on the Danube.
<a href="//www.flickr.com/people/92215305@N00" class="extiw" title="flickruser:92215305@N00">Don Heffernan</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/92215305@N00/9349501031">PragueViennaBike346</a>