I have dove Blue Springs for 35 years. It has not changed much. There used to be tons of giant white shells lining the run, but now it is heavy with green plant growth. Years ago you could also go all the way to the bottom, where the water jets out from the closure in the rock. That room has seemed to get larger, and it is black dark in there now. In the afternoon there used to be light all the way down, perhaps from a change in the axis of the world. This is the best there is.