Spouting Horn, Natural blowhole on south shore of Kauai, US.
Spouting Horn is a blowhole on the south shore of Kauai where ocean waves crash into an underground lava cavity and force water up through a narrow opening in the rock, sometimes reaching 15 meters high. The site has paved walkways, information panels, free parking, and local craft vendors set up nearby.
The geological formation developed over many centuries as waves continuously wore away the volcanic rock, carving out an intricate system of underground channels and cavities. This natural sculpting process continues today with each tide.
The site holds significance in Native Hawaiian stories as the home of Kaikapu, a lizard spirit said to be trapped here long ago. This legend remains alive in local traditions and gives the place a spiritual dimension that visitors can sense.
The display is most dramatic during high wave conditions when the spray shoots highest; on calm days the effect is less impressive. The viewing area is easy to reach on foot, but wear sturdy shoes as the rocks nearby can be slippery and wet.
The phenomenon creates two distinct sounds: a hissing of air escaping and a thunderous boom when water shoots upward. The soundscape is something many visitors overlook, adding another dimension to the experience beyond what the eyes see.
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