Diamond Head is a crater like formation in Hawaii on the island of Oahu. According to Wikipedia it is a volcanic tuff cone.
To me it resembled and felt like a crater. I had never visited the place the entire time I lived on Oahu which ended up being 7 years. When I went for a visit the hike up Diamond Head became my only form of work out. The natural air, the wind in my hair and face, the bus ride to Kapiolani Community College, then the walk up to Diamond Head proper before one started to hike up the crater.
I hiked up that crater three times a week. It was good for my heart rate.
Good for my sweat glands. Good for my walking step counts. Good for the beauty once you got to the head of Diamond Head. The view picturesque as you saw the entire Honolulu down-town, parts of Waikiki and the surf.
The hike is unique because it has dark tunnels, open trails, hikes up many stairs right before you get to the summit to see the breath-taking view of Honolulu City. If you ever do visit Honolulu or Waikiki I do suggest a hike up the Diamond Head trail.
It is good for the heart, soul, beauty and it is therapeutic. This is because of the picturesque views as well as being on top of one of the youngest volcanic set of Hawaii Islands.