Watching the clouds go is actually pretty cool. If you catch it toward the end you can see the sun setting and the sky glow orange for a couple of seconds...
They used orange spray paint, I have trouble seeing it (partially color blind) and I think it's too far for the camera to pick up well. There will be a stream up the left-hand side and a wetland filter in the back in front of the playset, but they've now covered most of the stream up with dirt.
In the beginning, you see smaller versions of a stacked slate spillway. To get the depth we wanted (4ft) we are going to use those under the weathered limestone to create the deep area. That way we were able to go more vertical and leave more open space for the deep area, i.e. fewer tiers. We laid those out so he could paint the area to be dugout.