At the end of the main road in Kauai ... driving north ... you arrive at a state park/beach. This is Haena. It's pretty much the start of the Na Pali coastline in the NW portion of the island. Its gorgeous. Its about a 20 minute drive from Hanalei bay and if you time it right you can hit the sunset - which is what I did. Once the sun was just about to go below the mountains in Hanalei, I drove right to the park. I made it there with about 30 minutes to spare and had some time to do a short hike over some lava rocks to a point where I witnessed the sunset sitting on a rock.