Here are some of the websites we find useful and enjoy reading:
https://jcarter5826.wixsite.com/johnshomebuiltstuff
https://www.beyondthesump.org/
https://digwookeyhole.mendipgeoarch.net/
http://simonbeck.blogspot.com/
http://cavesurvey.com/CaveSurveyProjects.htm
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