Take Waimea Canyon Drive and keep going till you get to lookout.
Got lucky with the clouds. Was a very clear day. Kauai is the wettest place on earth, and there is often cloud cover over the valley.
This photo is of the Kalalau Valley, which is hte largest valley of the Na Pali Coast. The coast itself is inaccessible via car and can only be reached on foot or via boat. The photo was taken in June 2013 from the Kalalau lookout. I hiked up to the highest little ridge I could that would give me the best vantage point. The small lines you see in the ocean down below are wakes from a couple of small boats.