Hiking up Diamond Head State Monument

"Situated just minutes from Waikiki, this impressive 300,000-year-old volcanic crater invites visitors to go hiking and take in the natural beauty and untold mysteries of Hawaii. Start at the visitor center kiosk to learn more about this stunning landmark then walk up a steep and strenuous, .8-mile hiking trail to the summit. Reach the top and you'll be rewarded with breathtaking views of the saucer-shaped crater floor, lighthouse, and the Koko Head coastline."