Turquoise Sea, Sardinia, Italy
No jellyfish, sharks, or seaweed! World's largest swimming pool - in Chile - 1013 meters long covers 80 acres, its deepest end reaches 115ft and it holds 66 million gallons of water
Jackson Hole, Wyoming
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!
North Shore , Oahu , Hawaii
16 cheapest overwater bungalow resorts in the world