Once visitors are aware that hālona means “lookout” in Hawaiian, it becomes quite clear what the Halona Blowhole is about: views, Pacific Ocean and blowhole! The Halona Blowhole is one of the most spectacular natural wonders on O’ahu Island; the more than 1,000-year-old geyser-like rock formation is characterized by a hole which propels incoming surf in a narrow, molten lava tube, shooting sea spray high into the air as a result - sometimes up to 30 feet. This is mostly a summery phenomenon but wintertime also has a big ticket item drawing visitors: humpback whales. The lookout point offers unobstructed views of the O’ahu shoreline as well as glimpses of Lanai and Moloka'I Islands on clear days.

The coast is home to a special type of coral that requires very little light to live, the Sinularia Leather Coral, where it is possible to find various species like echinoderms, slugs, corals, and eels. And although the marine life is quite plentiful and fascinating, divers should proceed with caution because of the strong and sometimes erratic currents, including the colloquially named Moloka'i Express, which can drag divers out to sea without warning. Visitors should know that below the hālona is one of the most dangerous ocean currents in the world, and should always proceed with care.