Balmorhea is great state park, out 'near' Big Bend national park. Spring fed by the San Solomon Springs, 72-76F all year, huge, flowing at a rate of 22 to 28 million gallons per day and in the middle of the desert. Just what you need after a hot day. These shots were all taken with the Canon G10, using the underwater housing (WP-DC28). Everything worked, even though I was a bit apprehensive the first time getting into the water with the camera. Easy to use, almost all of the controls (apart from the rear dial) work.