Kahaluu Taro Loi Historic District - Credit: Wikimedia Commons
The Kahaluu Taro Loi Historic District, also known as the Āhuimanu Taro Complex, in Kahaluu on the windward side of Oʻahu, is the most complex and largest intact system of terraces for growing wetland taro on Oʻahu. It contains at least 18 loi (pondfield) terraces once watered by Āhuimanu Stream and associated auwai (irrigation ditches) over about that start from headwaters just below the cliffs of the Koolau Range. It was added to the National Register of Historic Places in 1973, after windward residents raised concerns about development plans in the area. The Kahaluu Fish Pond was also added to the National Register at that time. Read more on Wikipedia
Source: en.wikipedia.org