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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20101213141412" timestamp="2010-12-13T14:14:12Z" ns="0" title="Jharkendar: Schatzkarte" />
        <page value="20101213141421" timestamp="2010-12-13T14:14:21Z" ns="0" title="Khorinis: Karte der Hafenstadt" />
        <page value="20101213141421" timestamp="2010-12-13T14:14:21Z" ns="0" title="Khorinis: Karte der heiligen Schreine" />
        <page value="20101213141421" timestamp="2010-12-13T14:14:21Z" ns="0" title="Khorinis: Insel" />
        <page value="20101213141421" timestamp="2010-12-13T14:14:21Z" ns="0" title="Khorinis: Karte der Höhlen" />
        <page value="20101213141424" timestamp="2010-12-13T14:14:24Z" ns="0" title="Khorinis: Sehr alte Karte" />
        <page value="20101213141424" timestamp="2010-12-13T14:14:24Z" ns="0" title="Khorinis: Landkarte" />
        <page value="20101213141429" timestamp="2010-12-13T14:14:29Z" ns="0" title="Minental: Übersicht Neues Lager" />
        <page value="20101213141429" timestamp="2010-12-13T14:14:29Z" ns="0" title="Minental: Übersicht Altes Lager" />
        <page value="20101213141430" timestamp="2010-12-13T14:14:30Z" ns="0" title="Minental: Übersicht Sumpflager" />
      </results>
    </querypage>
  </query>
</api>