Diamond Head State Monument

Hot, dusty trail.  Lots of stairs.  Heaven on top.  Totally worth it!  Though the hike to the top of Diamond Head is hot and dusty, its still a favorite.  Just think how amazing it is that you are able to walk through and reach the top of a volcano.

http://www.hawaiistateparks.org/parks/oahu/index.cfm?park_id=15