The meandering current lets people float around their Prosper, Texas, property or, if they want, they can paddle from the river into a largeswimmingpool.
On the outskirts of Omaha, Mr. Davis's sprawling 150-acre property consists of his main home, several barns, an observatory, a circa-1920s guest house and largeswimmingpool with a waterfall.
The largest series of pools in the capital, Palatinus Beach on Margaret Island has a dozen pools (three with thermal waters) and one extra-large swimmingpool, wave machines and water slides.