This underwater marine reserve is one of the most beautiful spots on the island. Dramatic cliffs surround super deep, crystal clear, turquoise water chock-full of stunning coral pinnacles and tropical fish. The brown sand at west-facing Napoopoo Beach, washed away during Hurrican Iniki in 1992, is slowly returning. You can easily enter the water here. This is a nice place to swim as it's well protected from currents. No lifeguards; at times, you may feel tiny jellyfish stings. www.hawaiistateparks.org/parks/hawaii/index.cfm?park_id=46.