Ulupō Heiau on the eastern edge of Kawai Nui Marsh in Kailua, Hawaiʻi, is an ancient site associated in legend with the menehune, but later with high chiefs of Oʻahu, such as Kakuhihewa in the 15th century and Kualiʻi in the late 17th century. It may have reached the peak of its importance in 1750, before being abandoned after Oʻahu was conquered in the 1780s. The site became a territorial park in 1954, was partially restored in the early 1960s, marked with a bronze plaque by the State Commission on Historical Sites in 1962, and listed on the National Register of Historic Places in 1972.