Koh Khai Nok is a small island tucked away in Phang Nga Bay.
It's only 30 minutes or so away from the east coast of Phuket but ask anyone on the island if they've been there and you will probably draw a blank stare.
It is a small wonderful island of very white clear sand and crystal clear water.
There are the areas of good swimming and skin diving where many fishes are found.
Still, a hidden gem is sometimes all the more precious for being so and when we discovered a half day tour was going there we leapt at the opportunity to try it out.