So the video I aw was showing a tunnel entrance that looked like a hole with ground water.
This report from Syria:
“Baghouz is the last ISIS-held village left, the last remnants of what was once a territory the size of Indiana, with 8 million people under ISIS’ rule. Now, they are down to a sliver of land no more than half a square mile. We’re at the closest point.
“We’re told most ISIS fighters, wives and children are underground underneath the tents. They stay hidden, living a subterranean life in caves and tunnels. Because of that, there is no way to know how many remain. It is believed some of the tunnels are miles long — and they may still have supply lines.”