We just wrote a couple posts here and here about our liveaboard scuba diving experience in the Similan Islands. We were on (or in) the water for 4 days and 4 nights, but had the option to go to shore on a dingy to hang out on a secluded beach one day. Of course Yuriy and I jumped at the chance.
This tiny island has no civilization and we were the only boat that had pulled up in the middle of the afternoon. It was extremely peaceful and still. The sun blazed down and I had to run on the sand because it burned the soles of my feet. We hiked up a trail to the top of the hill to take in a beautiful view of the Andaman Sea, then laid around with books and pumpkin seeds until we were rounded back to the ship for another dive.
This is the life.