Turner Falls Park in Davis is the oldest park in Oklahoma. Many springs from the world famous Arbuckle Mountains form Honey Creek that cascades down a seventy-seven foot fall to a natural swimming pool making the majestic Turner Falls the largest waterfall in Oklahoma.   The park covers 1,500 acres and contains nature trails, caves and other interesting features including a walk-in castle built in the 1930s.     For more info like this, subscribe to the Only in OK Show.