Train of the Metro Porto (Flexity Outlook Eurotram) at Trindade station, Porto, Portugal
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/77704362@N00">Cornelius Kibelka</a> from Berlin, Germany
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/j-cornelius/407708996/">Metro do Porto</a>