Diamond Head is a volcanic tuff cone located on the eastern side of the Hawaiian island of Oahu. It is a popular tourist destination, known for its scenic hiking trail that leads to the summit of the cone, offering breathtaking views of the surrounding area.

Diamond Head was formed approximately 300,000 years ago as a result of volcanic activity and was named "Lēʻahi" by the native Hawaiians. The trail to the summit was built in 1908 and was used as a military lookout during World War II. Today, the trail to the summit is a popular tourist attraction, attracting hundreds of thousands of visitors each year.

The trail is approximately 1.6 miles (2.6 kilometers) round-trip and is considered to be a moderate hike. Along the way, visitors will encounter several tunnels, steep stairs, and switchbacks. The hike takes about 1-2 hours and is a great way to enjoy the beauty of Diamond Head and the surrounding area.

At the summit, visitors will be treated to breathtaking views of Waikiki Beach, the Pacific Ocean, and the surrounding neighborhoods. On clear days, visitors can see for miles in every direction, making Diamond Head one of the most popular tourist destinations in Hawaii.