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I'ao Valley and the volcanic rocks on its enclosing slopes illustrate the major episode of volcanism that created the western portion of the island of Maui. Erosion of the volcanic rocks has resulted in an amphitheater shaped valley.
Location: Maui Island, HI
Year designated: 1972
Ownership: State, Private
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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012