After retrieving one of Tuptim's caches (The Descent) recently, looking further up the coast, I noticed a small secluded beach. Now you've discovered it, or you will discover it shortly.
I would much rather spend my time on the soft white sandy beach at Sai Keow Beach. That sand is like walking on flour or powdered sugar. Silky Smoothe and much much easier to get there. However, this beach may be secluded for privacy but it's a bit rocky. If you get here at low tide, the sand is much softer but it might be a bit wet
So why place a cache at a location that is not a fun walk in the hot sun? Because it's secluded and you may want to enjoy some Privacy on Koh Samet that most people haven't a clue it even exists.
Enjoy!