Can't tell from image, but this is a little brick room built on the roof of the factory.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/68546684@N00">Eric Jusino</a> from Denver, CO, USA
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/68546684@N00/1548980806/">rooftop shop</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:Xnatedawgx" title="User:Xnatedawgx">xnatedawgx</a></li></ul>