Halona Blowhole, Oahu

The Hālona Blowhole is one of Hawai‘i’s natural wonders, created thousands of years ago when molten lava tubes were formed from volcanic eruptions. There aren’t any active volcanoes on O‘ahu anymore, but the blowhole remains a must-see scenic stop.

Hālona, in Hawaiian, means “lookout,” and visitors can see miles of pristine coastline waters from the lookout. On clear days, the islands of Moloka‘i and Lāna‘i can also be seen in the distance.

The blowhole overlooks some of the most violent waters in Hawai‘i, and when the Ka‘iwi Channel is churning during the winter months, strong currents and big waves send waters rushing into the molten lava tubes below the lookout, sending geysers as high as 30 feet through the blowhole. The bigger the waves, the higher the geysers. Visitors can literally hear and feel the waters rumbling below just before the eruptions.