5. The Tank, Golden Nugget – Las Vegas, USA
A pool-meets-aquarium hybrid, The Tank is a 200,000-gallon aquatic playground with a three-story waterslide that shoots swimmers through a shark-filled tank, safely enclosed in clear acrylic. Surrounded by cabanas, bars, and DJ beats, it’s more than a pool—it’s a full-on Vegas spectacle. Size meets thrill here in the most unforgettable way possible.