here are some images from pool 4. the first two are a sunken upside down car on lake pepin. you can see one of the doors is open… probably from whoever dove down and had to get the people out
the third picture is a hard rock to sand transition with a big hole on the right
fourth picture is of a hole surrounded by anything and everything
not sure what is in the 5th picture. a big pipe, or the great wall of pepin?
the last picture is that same car on the left, and the zoomed in picture almost looks like a longer frame to some other kind of vechicle. whatever is to the right of that is holding a bunch of fish.