Underground chamber discovered
VIDEO AND DESCRIPTION IMPORTED FROM YOUTUBE
Craig Sawyer owns the copyright, and he has since removed it from his own YouTube video channel, and the reasons he gives for removing it are found here: https://www.youtube.com/watch?v=rAVuAvkE6bM
As part of the initial investigation, we are keeping it available to the public under the Fair Use Act.
Original source: https://www.youtube.com/watch?v=ub4h85HPe7c