Diamond Head is a volcanic tuff cone located on the southern coast of Oahu, Hawaii. It rises about 760 feet (230 meters) above sea level and is a popular hiking destination, offering stunning views of the surrounding area and the Pacific Ocean. The formation is approximately 300,000 years old and is one of the most recognized landmarks in Hawaii. The area around Diamond Head is a state monument, designated to preserve its unique geological features and natural beauty. Visitors can explore a 1.6-mile trail that leads to the summit, where they can see the historic Diamond Head Lighthouse and enjoy panoramic views. The site is also home to various native plants and wildlife.