Diamond Head

Diamond Head State Monument was a must see on my list, to O'ahu. We acually walked from our hotel to the monument. There's a tunnel that you enter on the outside that takes you straight to the 350 acre crater. They say to give yourself 1.5 to 2 hours to hike and take in the breath taking scenery. On the way back down, you can purchase a fresh cut coconut drink! The entire experience is pretty amazing.