For a view of the King's Highway, and one of the largest ironwood forests in Puna, MacKenzie State Recreational Area is the place to go.  Off the cliffs whales, dolphins, yellow fin tuna, and turtles can often be seen. If you like to explore lava tubes, there is one in this park, about 100 feet east of the picnic shelter there is an opening into one.  Be sure to take your flashlight.