The five-acre area known as Beachlife at the Hard Rock Hotel & Casino in Las Vegas features multiple pools (including the Nirvana Pool for guests only), dozens of Tahitian-style cabanas and 25 daybeds. Hard Rock helped launch the day club trend in Vegas, and weekend, Paradise Beach transforms into Rehab, the wildest pool party on the Strip.
Photo courtesy of Hard Rock Hotel and Casino Las Vegas

The year-round 90-degree pool at Glenwood Hot Springs Lodge in Glenwood Springs, Colo. is like one giant hot tub. The spring that feeds the world's largest hot springs pool is rich in minerals – 15 to be exact – famous for their soothing, restorative properties. Two waterslides appeal to younger swimmers.
Photo courtesy of Glenwood Hot Springs Lodge

A favorite with families, the JW Marriott San Antonio Hill Country Resort near San Antonio is home to the River Bluff Water Experience, a resort water park with a 1,100-foot lazy river, waterslides, a kid's pool, an interactive water play area, infinity-edge adults-only pool and cabana rentals.
Photo courtesy of JW Marriott San Antonio Hill Country Resort

Located on Duck Key in the Florida Keys, Hawks Cay Resort boasts six distinct swimming pools, including the adults-only Tranquility Pool, a kid favorite Pirate Ship Pool and the romantic Sunset Pool for partaking in a Florida Keys pastime: watching the sun sink below the horizon. An enclosed saltwater lagoon provides a home to tropical fish and a perfect setting for snorkeling.
Photo courtesy of Hawks Cay Resort by Jason Stemple

Separate areas for floating and meditating, underwater music and poolside cabanas that come with a personal butler make the pool at the trendy Delano South Beach feel more like a sophisticated "water salon." This Phillipe Starck-designed adult aquatic playground is at once sophisticated and chic – an institution of the South Beach hotel scene.
Photo courtesy of Alexis / Flickr

Heated to a pleasant 82 degrees 365 days a year, the pool at Harrah's Resort in Atlantic City sits within a giant glass dome, where guests have their choice of the pool, 5 hot tubs and luxury cabanas equipped with flat screen TVs, iPod docking stations and couches large enough for snoozing. On Thursday nights, the indoor pool becomes an aquatic nightclub.
Photo courtesy of Harrah's Resort Atlantic City

A water slide, rapids, caves, a water elevator, rope swing, sand beach, swim-up bar ... there isn't much the pool complex at the Grand Wailea Resort in Maui doesn't have. Besides the 25,700-total-square-foot Activity Pool, the multi-tiered pool area also offers an adults-only Hibiscus Pool finished with 630,000 pieces of Mexican glass mosaic tile and plenty of loungers and cabanas.
Photo courtesy of Grand Wailea Resort

The Sheraton Waikiki Hotel in Honolulu offers a family-friendly activity pool with all the bells and whistles: a waterslide, volleyball net, basketball hoop, two large whirlpools and an interactive fountain area. But the real star at this Hawaiian resort is the heated oceanfront infinity pool – one of the longest in North America – with its stunning views of Waikiki and Diamond Head.
Photo courtesy of Sheraton Waikiki Hotel

Romantic and chic, surrounded by flowers and filled with flickering lanterns, the pool at the Mondrian Los Angeles occupies a rooftop teak deck with sweeping views of the surrounding city. Underwater music soothes, while the adjacent Skybar serves up fresh cocktails and Hollywood glamor in spades.
Photo courtesy of Jacob Wackerhausen

Five separate pools create a giant outdoor playground in the Scottsdale desert for visitors of all ages. At the heart of the Fairmont Scottsdale Princess pool complex, the 6,000-square-foot Sonoran Splash features two waterslides, a zero entry pool deck and a sandbox play area, perfect for families with young children. Cabana rentals include a flat screen TV, a mini fridge stocked with water and fruit and a dedicated server.
Photo courtesy of Fairmont Hotels & Resorts