Cave diving into the less-dived downstream tunnels of Cow Spring. There are three tunnels to explore. They are small and don't go very far before they get too small. Diving downstream presents the problem of diving in lots of particulates coming from the sink as well, and any silt or debris stirred up will race ahead of you if you are going to slow and decrease your visibility. Check out my book "The Education of a Cave Diver" here: https://www.amazon.com/Education-Cave...