Koko head trail

Hālona Blowhole is a rock formation and a blowhole on the island of Oahu, Hawaii off of Hanauma Bay at Hālona Point overlooking the Pacific Ocean. In Hawaiian hālona means "lookout".

The Koko Crater Botanical Garden (60 acres) is a botanical garden located within the Koko Crater (Koko Head) on the eastern end of Oahu, Hawaii. It was given the dual title of the Charles M. Wills Cactus Garden by the Honolulu Department of Parks and Recreation, in recognition of his contributions to the garden, in 1966.