Halekiʻi-Pihana Heiau State Monument is a 10-acre (4.0 ha) park containing two important luakini heiau on a high ridge near the mouth of ʻIao Stream in Wailuku, Maui. Both Halekiʻi and Pihana were associated with important Hawaiian chiefs, have been closely studied by archaeologists,[2] and overlook the fertile Nā Wai ʻEhā ('Four Waters') region irrigated by the Wailuku, Waikapu, Waiheʻe and Waiehu streams.[3] The heiau complex was added to the National Register of Historic Places on 25 November 1985.[1]