Ha Ha Tonka State Park
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Ha Ha Tonka State Park is a Missouri state park located on the Niangua River arm of the Lake of the Ozarks near Camdenton. The area has several caves, sinkholes, and bluffs overlooking the lake. The most famous part of the park is the ruins of an old "castle" (actually a mansion) which burned down in 1942. The state purchased the property for the park which opened in 1978.