Diamond Head State Monument

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Colloquially known as 'Le'ahi', the Diamond Head is a gaping crater which was declared a National Historic Landmark in 1936. Framing the fabric of Waikīkī, the crater is riddled with a tracery of vents and volcanic remnants. The name of this crater was coined when English explorers mistook calcite crystals they found there, for diamonds. The historic trail to the 761-foot summit starts inside the crater and is an easy, but steep, 0.8 mile (1.3 km) hike to the top. Adorned with craggy corrugations and tufts of sun-bleached grass, Diamond Head affords astounding views of Oahu's charming landscape, including some exceptional views of its beaches and locales.

Location:  Diamond Head Road & 18th Avenue

Business hours:  Mo-Su 6:00 a.m.-6:00 p.m.