River by far is my favorite swimming spot. Specifically the Comal River in New Braunfels, Texas. It is spring fed, crystal clear, no chlorine, just good clean H2O. The absolute best thing to do is float in an innertube on the Comal. You can lay on top of the tub and just relax, contemplate your pedicure and watch the world float past, or you can look through the center of the tube and watch what is on the bottom or look at the fish. This is such relaxing experience. Hubby and I honeymooned in New Braunfels and have gone back there almost every summer since. Would love to own a home on the Comal, however, it's the shortest river in the country, and real estate is sky high!!
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Marilyn 
If anyone would like a free Bible Study CD or book entitled "Searching for Truth", PM me with your mailing address and I'll send you one. "And you shall know the truth and the truth shall set you free." John 8:32