Fall Creek Gorge Nature Preserve near Attica, Indiana Around the corner from the tributary stream, you immediately come to the "pothole" section of the gorge. The action of the water along this narrow stream bed has formed these small basins, nicknamed "potholes". They range in size from 1 foot to more than 6 feet across and are as much as 4 - 5 feet deep. This was actually as far as I could get going up stream without literally going for a swim. With the air temp at 50 degrees F and the water even colder, I decided to take the high road along the cliff after taking a couple of shots here.