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>
    <unreviewedpages urstart="Acqua_misteriosa" />
  </query-continue>
  <query>
    <unreviewedpages>
      <p pageid="13425" ns="0" title="Abito di nozze" revid="51105" />
      <p pageid="8770" ns="0" title="Accampamento Est dei Mercanti" revid="33769" />
      <p pageid="8870" ns="0" title="Accampamento dei Banditi del Deserto" revid="34016" />
      <p pageid="8766" ns="0" title="Accampamento di Garton" revid="33756" />
      <p pageid="8765" ns="0" title="Accampamento di Kerus" revid="37675" />
      <p pageid="8764" ns="0" title="Accampamento di Melki" revid="33752" />
      <p pageid="8763" ns="0" title="Accampamento di Neil" revid="33750" />
      <p pageid="13771" ns="0" title="Acconciatura di nozze" revid="51884" />
      <p pageid="11572" ns="0" title="Acqua Misteriosa" revid="43673" />
      <p pageid="11749" ns="0" title="Acqua della Fonte" revid="44335" />
    </unreviewedpages>
  </query>
</api>