Diamond Head, Honolulu

Diamond Head, known in Hawaiian as Lēʻahi, is an iconic volcanic cone located on the island of Oahu, within the city limits of Honolulu, United States. This distinctive geological feature and landmark is a defining part of the Honolulu skyline and offers panoramic views of the Pacific Ocean and the Hawaiian coastline.

Formed around 300,000 years ago during a single, explosive eruption, Diamond Head is a classic example of a tuff cone – a type of volcanic cone made from ash and fine particles that have solidified following a volcanic eruption. It covers a vast area of over 475 acres and has a diameter of about 3,520 feet.

For tourists looking to explore Diamond Head, the summit is accessible via a well-maintained hiking trail that was originally built in 1908 as part of the island's coastal defense system. The hike is moderately challenging, with a steep incline and numerous switchbacks, stairs, and tunnels. The trail stretches for approximately 0.8 miles one way and ascends 560 feet from the crater floor to the summit.

Once at the peak, visitors are rewarded with breathtaking 360-degree views of Waikiki, Honolulu, and the Pacific Ocean. The hike is a popular activity for both locals and tourists, providing a unique opportunity to experience the natural beauty of Hawaii and learn about its volcanic history.

Visitors should be prepared for the hike with appropriate footwear, water, and sun protection, as the trail can be hot and dry with limited shade. The state monument is open from 6:00 AM to 6:00 PM daily, and there is a small entrance fee that helps with the maintenance of the park.

The name "Diamond Head" dates back to the 19th century when British sailors mistook calcite crystals found on the beach for diamonds. Although no precious stones were ever discovered, the name stuck and has since become synonymous with the site.