I love Hawaii and have spent quite a lot of time there. It is my favorite place to travel to and I do it quite often. For anyone who loves to snorkel or scuba dive you have to take a trip to Niihau, you will find the water unbelievable.
The coast line, waterfalls, and all the sea caves around the Hawaiian island Niihau make this trip worth it even more. I just can't get enough of the scenery when I go there either.
Be sure and watch for Hawaiian Monk seals, if you watch carefully you may be able to spot some of them.
So my recomendation to all vacationers that want to scuba dive or snorkel when they vacation in Hawaii to make sure you take the time to go to Niihau Island. It will be well worth the trip and you will want to go back again and again.