Natural Bridge in the McLaughlin Trunk.
Culverson Creek resurges into the McLaughlin Trunk after sinking in the Cascade Siphon about 700ft away through the wall to the right of this photo.
This day, Culverson Creek was so high that the creek backed up from Cascade Siphon and entered the aptly named Overflow Tube.
The OVerflow Tube can be big, this here is Mud Hall as seen from the top of the Mudderhorn.
To get into the cave one enters the Wildcat Connector passage, a beautifully circular borehole.