Menehune Rd, Waimea, Kauai, Hawaii
Legend has it that this mysterious aqueduct, which once delivered water from the upper Waimea River to the taro fields in the valley below, was the handiwork of the Menehuna (the small-statured first inhabitants of Kauai) who were able to complete it in a single night. This amazing feat was purportedly accomplished by recruiting each Menehuna to carry a single stone 18 kilometers to the building site. Its true origin, however, remains a mystery, though it certainly stands as a testament to the islanders’ hard work and ingenuity. The ditch was originally walled 24-feet high on both sides and stretched several miles long. Now a National Historical Landmark, its remains span 50 feet long by 2 feet wide.