Take a dip in these extreme pools.
Nemo 33 in Brussels, Belgium, is the world's deepest man-made diving pool.
Divers at Nemo 33 can plunge 108 feet into a man-made abyss.
You need to be a personal friend of the owners to visit this private pool built by Red Rock Contractors in Gilbert, AZ.
The country's fanciest private pool features a waterfall, waterslide, fountains and lighting components.
Designed by Phillipe Stark, Miami's Icon Brickell has a reflection pool, lap pool and the world's largest hot tub.
The NASA pool in Houston is used to simulate outer space here on Earth for astronauts training for their space flights.
At the Starkenberger Brewery in Tarrenz, Austria, you can take a dip in the world's only pool filled entirely with beer.
At the Golden Nugget pool in Las Vegas, you can come face to face with over 300 different types of fish and 16 sharks.
The 27x14-foot pool at the Hotel Grace doubles as a sexy nightclub where New Yorkers can sip drinks and mingle.
The San Alfonso Del Mar Resort in Algarrobo, Chile, has the largest pool on the planet, covering 20 acres.
Tucked deep inside the Utah mountains is a natural cave filled with crystal-clear water known simply as the Crater.
Travel through a 100-foot limestone tunnel to access the Crater, the only warm-water, scuba-diving destination in the US.