In Kauai, you can't escape hearing about the local legend of the Menehune, a mythical group of small people who worked only at night to accomplish engineering feats.  Although only a small portion of the irrigation system remains, the Menehune were apparently responsible for building the impressive Menehune Ditch... in one night, which transported water from Waimea River to the thirsty taro fields.  Located directly across from the remnants of the Ditch is the picturesque Waimea Swinging Bridge, which provides access to farms on the opposite side of the river.  Turn onto Menehune Road from town to reach the Ditch and the Swinging Bridge.