<a href="//commons.wikimedia.org/wiki/Castle_of_Canossa" class="mw-redirect" title="Castle of Canossa">Castle of Canossa</a>, <a href="//commons.wikimedia.org/wiki/Canossa" class="mw-redirect" title="Canossa">Canossa</a>, Italy. The grey rock in the foreground is <a href="https://en.wikipedia.org/wiki/Olistostrome" class="extiw" title="en:Olistostrome">olistostrome melange</a> of <a href="https://en.wikipedia.org/wiki/Miocene" class="extiw" title="en:Miocene">Miocene</a> age.
Paolo da Reggio
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>