The most beautiful hotel Pool I've ever seen, can be found at the Kaua'i Marriott Resort. This wonderful pool is surrounded by a several hot tub type pools. Take a look and judge for yourself....
I will "third" the motion.
The Kauai Marriott Hotel and Beach Club his is a rare combination hotel/timeshare resort ("Beach Club") that incorporates the advantages of both with no noticable disadvantages of its own.
Furthermore, the Kauai Marriott fronts a one-quarter mile strip of fabulous Kalapaki Beach with its calmer waters and finely granulated sand. Kalapaki is a sheltered beach in that it is part of the Lihue harbor and does not front the open ocean --- which results in milder breakers and no rough ocean surf. Read it very pleasant swimming. Though all beaches in HI are public, the Marriott is one of a very few pieces of property fronting Kalapaki beach which means far smaller beach crowds.