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Anyone that's lived in the mountains around here knows there are sinkholes popping up from time to time due to the limestone caves underneath just collapsing...but it is a sink hole. It sinks, falls in...slowly. If its real quick it may drop a few feet in a day and then more over a week or two.
This monstrosity is not a sinkhole, even if they call it that. Hell's Elevator would be a more fitting name for this catastrophe.
I'd like to see some pics from a RC camera drone of the interior!
Derek