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Honolulu, Hawaii
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Despite its name, Diamond Head got its moniker from British sailors in the 19th century who mistook calcite crystals in the rocks for diamonds.
The original Hawaiian name for Diamond Head is Lēʻahi, which means 'brow of the tuna' due to its resemblance to the dorsal fin of a tuna fish.
Diamond Head was used as a strategic military lookout in the early 1900s, with bunkers and an observation deck built into the crater.
Diamond Head is estimated to be about 300,000 years old, formed during a single, brief volcanic eruption.
The Diamond Head Summit Trail is a popular hiking route that leads to panoramic views of Honolulu and the Pacific Ocean.
In 1968, Diamond Head was designated a National Natural Landmark due to its unique geological features and historical significance.
The crater of Diamond Head is about 3,520 feet in diameter and 760 feet in height, making it a prominent feature on the Honolulu skyline.
