Hōlei Sea Arch

The viewing area is about a thousand feet past the gate at the end of the road, behind a railing. Stay behind it. The cliffs are unstable and waves can sweep the lower edge. Do not climb down. Do not hike past the gate onto the lava flats — hidden cracks, razor lava, and if there's an active ocean entry the steam plume carries hydrochloric acid. The arch will fall down eventually. It does not need to be photographed by you climbing on it.