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Take a tour through Bridal Cave and experience a family adventure you’ll never forget! See incredible mineral deposits, giant columns, delicate soda straws and massive draperies thoughout the cave. Bridal Cave has more known onyx formations than any other known cave or cavern. Park facilities include nature trails, picnic areas, lakeside viewing decks, public boat dock, observation tower, gift shop and Thunder Mountain Mining Company, a unique rock and mineral shop specializing in rocks, minerals, gemstones and educational materials for rock hounds of all ages.