The History and Mystery of Yemen’s ‘Well of Hell’ - The first-ever expedition to the bottom of a startling desert sinkhole found wonders—but only natural ones, by Sarah Durn October 20, 2021
"...Actually, there was a concern more sinister than reptiles and spirits when Al-Kindi finally reached the bottom: unexploded ordnance. Since 2014, Yemen has been in the midst of a bloody civil war and, Al-Kindi explains, pilots sometimes drop bombs into caves, since people seek shelter inside. “So that got me worried a bit,” he says. “Apart from that, it was a very enjoyable moment.” ...Al-Kindi estimates the sinkhole could be several million years old, but its origin, too, is the subject of local legend. One legend says an ancient king forced jinn to carve the “well” as a place to hide his treasure. In others, the well has always served to contain evil, uncontrollable jinn..."
Dye traces have shown that this cave system is fed by North America's largest #sinkhole. Walled on every side, #GrassyCove has valley walls 3k feet high all draining through the #MillCave on #BradyMountain 4/n