
Hawaiʻi Kai is part of Honolulu, which stretches along Oʻahu's southeastern shore from Pearl Harbor to Makapuʻu Point. Hanauma Bay Nature Preserve, near Koko Head at the eastern end of Honolulu, is open Wednesday through Sunday; visitors who are not Hawaiʻi residents pay to enter and should reserve online, and the City opens each day's reservations two days ahead, in the morning, Hawaiʻi time.
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Koko Crater Botanical Garden, a free City garden of dryland plants inside Koko Crater, is open daily from sunrise to sunset; bring your own water and walking shoes. At the Hālona Blowhole lookout, high surf makes the shore dangerous: obey the warning signs and stay behind the barriers. The Makapuʻu Point Lighthouse Trail starts off Kalanianaʻole Highway at the island's southeastern point and climbs a paved road to lookouts above the lighthouse, with no water or restrooms, so bring a hat, sunscreen and plenty of water. The Kuliʻouʻou Ridge Trail has dangerous cliffs and sudden drop-offs.
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