You don’t have to be a diver to see it. Just take a boat ride. Glass-bottom boats were invented at Silver Springs in the 1870s, and the tours are still the most popular activity at the park. For years these crystalline waters flowing from seven major springs have starred in movies. You’ve probably seen them on the big screen pretending to be some faraway exotic paradise. A first-magnitude spring―one of the largest in the United States―gushes 550 million gallons a day. It’s a wonder to behold. www.silversprings.com or (352) 236-2121.