The Diamond Head Summit & Historic Crater Tour invites you to ascend through scenic trails inside the 300,000-year-old volcanic crater of Lē‘ahi (Diamond Head). Along the way, you’ll pass military bunkers, gun emplacements, and old rifle pits constructed for coastal defenses. At the trail’s end, the summit rewards you with sweeping, unobstructed views of Honolulu, Waikīkī, and the Pacific Ocean. The hike is moderate but steep at portions, so bring good walking shoes, water, sun protection, and a camera. This is a blend of natural beauty, geology, and Oʻahu’s 20th-century military legacy.