You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aistart="2014-06-09T21:14:37Z" />
  </query-continue>
  <query>
    <allimages>
      <img name="The_enchanted_castle.jpg" timestamp="2021-08-25T14:41:51Z" user="Psy" url="http://psyki.net/images/e/e3/The_enchanted_castle.jpg" descriptionurl="http://psyki.net/wiki/File:The_enchanted_castle.jpg" ns="6" title="File:The enchanted castle.jpg" />
      <img name="Creationism.jpg" timestamp="2015-11-22T15:08:52Z" user="Joseph" url="http://psyki.net/images/d/d7/Creationism.jpg" descriptionurl="http://psyki.net/wiki/File:Creationism.jpg" ns="6" title="File:Creationism.jpg" />
      <img name="A_continuum_of_states_-_12-7-13.jpg" timestamp="2014-07-17T21:12:45Z" user="Psy" url="http://psyki.net/images/b/bc/A_continuum_of_states_-_12-7-13.jpg" descriptionurl="http://psyki.net/wiki/File:A_continuum_of_states_-_12-7-13.jpg" ns="6" title="File:A continuum of states - 12-7-13.jpg" />
      <img name="The_mind&#039;s_duality.jpg" timestamp="2014-07-17T20:58:12Z" user="Psy" url="http://psyki.net/images/8/8c/The_mind%27s_duality.jpg" descriptionurl="http://psyki.net/wiki/File:The_mind%27s_duality.jpg" ns="6" title="File:The mind&#039;s duality.jpg" />
      <img name="Thought_on_the_infinite.jpg" timestamp="2014-07-13T09:16:07Z" user="Psy" url="http://psyki.net/images/3/37/Thought_on_the_infinite.jpg" descriptionurl="http://psyki.net/wiki/File:Thought_on_the_infinite.jpg" ns="6" title="File:Thought on the infinite.jpg" />
      <img name="The_moment_of_execution.jpg" timestamp="2014-07-11T17:05:41Z" user="Psy" url="http://psyki.net/images/f/f9/The_moment_of_execution.jpg" descriptionurl="http://psyki.net/wiki/File:The_moment_of_execution.jpg" ns="6" title="File:The moment of execution.jpg" />
      <img name="A_cosmic_microcosm.jpg" timestamp="2014-06-18T12:30:36Z" user="Psy" url="http://psyki.net/images/9/9f/A_cosmic_microcosm.jpg" descriptionurl="http://psyki.net/wiki/File:A_cosmic_microcosm.jpg" ns="6" title="File:A cosmic microcosm.jpg" />
      <img name="Ideals.jpg" timestamp="2014-06-18T11:17:36Z" user="Psy" url="http://psyki.net/images/6/60/Ideals.jpg" descriptionurl="http://psyki.net/wiki/File:Ideals.jpg" ns="6" title="File:Ideals.jpg" />
      <img name="What_if.jpg" timestamp="2014-06-18T11:11:47Z" user="Psy" url="http://psyki.net/images/b/b3/What_if.jpg" descriptionurl="http://psyki.net/wiki/File:What_if.jpg" ns="6" title="File:What if.jpg" />
      <img name="Ephemeral_time.jpg" timestamp="2014-06-18T10:53:16Z" user="Psy" url="http://psyki.net/images/6/69/Ephemeral_time.jpg" descriptionurl="http://psyki.net/wiki/File:Ephemeral_time.jpg" ns="6" title="File:Ephemeral time.jpg" />
    </allimages>
  </query>
</api>