Science Physics Hawaii's 550-year-old Hōlei Sea Arch collapses into the ocean All sea arches must come to an end. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. A 550-year-old sea arch in Hawaii has fallen into the Pacific Ocean. While the exact timing is unknown, the iconic Hōlei Sea Arch in Hawaiʻi Volcanoes National Park on the Big Island collapsed by Sunday, September 27. According to Hawaiʻi Volcanoes National Park, the fall may have happened while the park was temporarily closed due to Tropical Storm Nolo .