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This is a real mystery. On the side of Poteau Mountain near Heavener is a state park with a beautiful view of the countryside and in the park on a vertical stone there is engraved Viking runes from the 11th century. The mysterious hieroglyphics have been decrypted to be the date "November 11, 1012". This is a day-use park with picnic tables, outdoor grills, playground, gift shop, hiking, nature trail and exploring.