Ulupō Heiau State Historic Site

The site centers on an immense stone platform measuring roughly 140 by 180 feet, with walls reaching up to 30 feet high. Lore alternately attributes its origins to the legendary menehune or to successive construction phases under aliʻi (chiefs). Historically tied to agricultural and religious practices in the Koʻolaupoko district, the heiau pairs its stark monumental presence with quiet, open views across the neighboring marsh.