Introduction to the Horn Fountain: The spectacular Horn Fountain is located on the south coast of Kauai. It is one of the attractions on Kauai that attracts the most tourists to take pictures. Poipu waves flow into natural lava channels, erupting into huge geysers at high tide and accompanied by Hawaii's legendary boos and roars. The views from the viewpoint are most spectacular at sunset. During the whale watching season from November to May each year, the Bophut coastline is also the best place to watch humpback whales.