Balmorhea State Park was very unusual. All of the sudden, in the middle of the flat Texas landscape, there arose a small village of small buildings, and that was the state park. It was home to a 3.5 million gallon freshwater spring which they had built into a pool. It was HUGE! The kids literally swam all day and climbed up and down the diving board. Sam jumped off the low diving board and begged to be able to jump off the high dive! There were big fish in the bottom of the spring- I did not care to see them or hear about them! All I saw were the little minnows swimming near the top. The water was so refreshing- a cool 72 degrees- enough to really cool you off, but not too cool that you couldn't get in.