<p><span style="font-size: large;"><span style="font-family: book antiqua,palatino;">It extends approximately over 50 kilometers from north to south and over 40 kilometers from east to west.<br /><br />It is a very complex structure, formed by several juxtaposed successive volcanoes :<br /><br />The northeast, The southeast, The Voragine and The Bocca Nuova<br /><br />The sides of the top offer a landscape of ashes and lava flows.<br /><br />More information<br /><br /><a title="http: // www.volcans.info/" href="http: // www.volcans.info/" target="_blank">http: // www.volcans.info/</a></span></span></p>