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As soon as you arrive on Oahu, you’ll be greeted by one of Hawaii’s most recognizable landmarks: Diamond Head. This extinct volcanic crater rises above the island’s south shore, forming a dramatic backdrop to Waikiki Beach. Visible for miles along the coastline, Diamond Head’s distinctive silhouette has become an enduring symbol of Oahu and one of the most photographed natural landmarks in Hawaii.
Diamond Head’s history stretches back to ancient Hawaii, when it was known as Leʻahi, meaning “brow of the tuna,” because its ridgeline resembles the shape of a tuna’s dorsal fin. The English name came later — a mistake by 19th-century British sailors who thought the calcite crystals glimmering in the rock were precious diamonds. Though the “diamonds” turned out to be worthless, the name endured, and “Diamond Head” has been used ever since.
This volcanic tuff cone is estimated to be between 400,000 and 500,000 years old. It erupted only once, during a short but violent period, and scientists confirm that it will never erupt again. Of Oahu’s five volcanoes, Diamond Head is the youngest, and its crater remains one of the island’s best-preserved geological features.
In modern times, Diamond Head has served several purposes beyond being a natural wonder. Designated a National Natural Landmark in 1968, the crater was also used as a military post in the early 20th century and later housed the FAA’s air traffic control center from 1963 to 2001. Today, the Hawaii State Civil Defense and National Guard maintain facilities within the crater, which are visible from the top of the hiking trail.
The Diamond Head hiking trail is one of Oahu’s most popular activities, offering panoramic views of the entire south shore. The trail is paved, with handrails and steps, making it accessible for most visitors. The reward at the summit is a breathtaking 360-degree view — from the glittering skyline of Waikiki to the rugged Koʻolau Mountains and the endless Pacific beyond. Many visitors time their hike to catch the sunrise from the summit — an unforgettable sight that perfectly captures the beauty of Oahu.
Due to the high volume of visitors traveling to Hawaii year-round, our Oahu tours and activities sell out quickly. In many cases, tours book weeks or even months in advance, especially our top seller, the Sea Life Park Luau. To ensure your spots, we recommend reserving your tours today. Call our office or book online to take advantage of our Low Price Guarantee and make the most of your time on Oahu.
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