Cassell on the Flat Line slide, eight stories high, and the steepest of the slides at Water World! Known as the highest water slides in the world, (Denver is a mile high, you know), the newest speed slides at Water World are called Flat Line, Red Line, and Pipe Line. Get ready for some heart-stopping drops as you race down these slides at speeds up to 40 mph. It's all the thrill you can handle in one day! Breathtaking views of downtown Denver can also be enjoyed at the top of the slide tower.
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Gonzo