This cone shaped outcropping of lava off Kualoa Point resembles the peasant's chapeau worn by rural Chinese - thus the name: Chinaman's Hat. The reef surrounding the island supports an abundance of marine life and is one of the O'ahu's best offshore islands. You can see Chinaman's Hat from numerous vantage points along the coast but the best view is to actually go out to the island. You can walk there during low tide but the best way to get there is via kayak.
On the island is a small beach nestled in a secluded cove. There is also a small cave carved out of lava and a steep volcanic cone perfect for exploring. The view of the Koolau Mountains, Mokapun peninsula, Kahaluu, Kaneohe, and Kailua is unmatched.
Off the Kamehameha Highway offshore from the Kualoa Point State Recreation Area, approximately 45 minute drive from Honolulu.
Climbing the volcanic cone takes about 20 minutes, is strenuous, and can be tricky so be careful.