<a href="https://en.wikipedia.org/wiki/Alcatraz" class="extiw" title="en:Alcatraz">Alcatraz</a>, as seen from <a href="https://en.wikipedia.org/wiki/Pier_39" class="extiw" title="en:Pier 39">Pier 39</a>. Panorama stitched from 6 portrait format images. For stitching PTGUI <a rel="nofollow" class="external autonumber" href="http://www.ptgui.com/">[2]</a> was used.
Christian Mehlführer, <i><a href="//commons.wikimedia.org/wiki/User:Chmehl" title="User:Chmehl">User:Chmehl</a></i>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>