Formed millions of years ago by the tremendous force of an underground river cutting through solid limestone rock, the Olentangy Indian Caverns today offer an exciting excursion into ancient Indian lore with a maze of beautiful winding passages and spacious underground rooms. There is evidence that the Wyandotte Indians used these caverns as a haven from the weather and from their enemies, the Delaware Indians. One of the large rooms contains "Council Rock", used by the Wyandotte's for tribal ceremonies.