Once you get closer to the top you have several staircases to climb and even pass through a dark tunnel before climbing a metal circular staircase (a la lighthouse style) which is -- you guess it -- also dark.
The entire hike takes only about an hour each way and is well worth the visit. From up top you can see Waikiki and a nice portion of the rest of the island. Makes for an awesome spot to take panoramic photos of the island.
However as Diamond Head is quite close to Waikiki beach and thus countless resorts, there is always a flood of tourists there. But it's not too bad... where in Hawaii is there not a flood of tourists?














