We used to visit this place as a family when I was a kid. During the Summer when the water is lower there are rocks you can walk on and leap to in the river beneath the weir. Because it has water in it, this video is a much better test of the filter. The best example of it working is near the end looking directly at the water falling over the weir, where you can see through the water to the brickwork behind. The videos were taken using a Droidworx CX quadcopter with 5000 mah 3 cell battery, Gopro Hero 3 Black edition with polarizing filter. I also used Fatshark goggles and a 5.8ghz video link.