The hidden world of the Knights Templar Prison Planet.com Posted on April 24, 2017 Posted in Aggregated No Comments Tagged with Sci Tech Daily Mail | Stunning images show mysterious carvings etched into a Hertfordshire cave by warrior monks 800 years ago. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email