Just when you thought it was safe to go back to the water parks. Today Allegra Frank brings you the twisted history of waterparks and where they came from. She also decides to focus on some pretty grim stuff, so if you're a little squeamish about injury or death, you may want to, uh, come back next week? Anyway, FUN!Learn more about your ad choices. Visit podcastchoices.com/adchoices