It was a hot, humid 90-degree day when I decided to go visit the base of a large lake dam near our home in SW Virginia. When I arrived I noted that water was being released from gates at the base of the dam, into the Smith River below. This is done periodically to help the natural habitat of the trout-laden river, which is not only a popular place to fish, but also to kayak. When water levels rise, rapids result and kayakers love that. Anyway, the closer I came to the river while walking down a steep slope I noticed how the air temperature was rapidly dropping, and when I put my hands in the river it felt like ice water. As the cold water mixed with warmer air further down from the dam, a misty fog began to appear…as you can see if you look carefully at the top center in the photo below. While walking along the riverbank, it was as if I were in an air conditioned valley…the coolness all being supplied by nature…a wonderful experience. But then I eventually had to climb up the steep riverbank to where my car was parked and that brought me back to reality. It was, however, fun while it lasted…and the “air conditioning” was free.