Sacro Speco, church built in a cavern where St. Francis used to pray, near Poggio Bustone sanctuary (<a href="//commons.wikimedia.org/wiki/Province_of_Rieti" title="Province of Rieti">Province of Rieti</a>, <a href="//commons.wikimedia.org/wiki/Lazio" title="Lazio">Lazio</a>, Italy)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/25869855@N04">Christopher John  SSF</a> from Stroud, NSW, Australia
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/friarsbalsam/5762457448/">20110517_Poggio_Bustone_Sacro_Speco_049</a>