ʻOpaekaʻa Falls is a waterfall located on the Wailua River in Wailua River State Park on the eastern side of the Hawaiian island of Kauai. It is a 151–foot waterfall that flows over basalt from volcanic eruptions millions of years ago. Below the ridge down into the ravine through which the water falls can be seen the vertical dikes of basalt that cut through the horizontal Koloa lava flows. The name "ʻOpaekaʻa" means rolling shrimp, "ʻopae" being Hawaiian for "shrimp," and "kaʻa" for "rolling".
It is not possible to climb down to where the water falls into a pool. The trail has been blocked by a steel fence since 2006 when two women fell off an unofficial but well-publicized rocky path to the pool. Two other hikers found their bodies 35 feet (11 m) away from the pool. Sources