Green Crater Rim of Diamond Head, Oʻahu

Green crater rim of Diamond Head, a volcanic tuff cone on the island of Oʻahu, Hawaii. The crater is a natural wonder that was formed by a volcanic eruption about 300,000 years ago. The crater is now a state monument and a popular hiking destination. The photo was taken from a distance, so the crater appears small in the frame, but it is actually 3,520 feet in diameter and 761 feet in height. The sky is a clear blue, and the crater contrasts with the surrounding landscape.