Kayak the Medina River in the Texas Hidden Hill Country. Winding through tunnels of towering bald cypress trees on its way to Bandera, the Medina River doesn’t get the crowds that flock to the Guadalupe River.
Okay so this isn't Katy, but it's not far -this is a great article on the water pools of Texas. The cool water of Barton Springs pool invites people of all ages to swim and relax in Austin’s summer sun. I love this place!