National Public Radio: Before Disney World, Silver Springs in Central Florida was for decades one of the state's most popular tourist destinations. Even if you've never visited Silver Springs, you might have seen it - if you're old enough. The 1960s television show Sea Hunt was filmed here, as were countless movies including Tarzan and Creature from the Black Lagoon. The crystal clear water of Silver Springs made it invaluable to Hollywood. Guy Marwick, the founder of the Silver River Museum, says it drew over a million...