Another spot to watch the sunset during your vacation is Phuket Promthep Cape, the southernmost tip of the island.
Especially on a clear day, if you go to the promontory that stretches towards the Andaman Sea, you can easily see the islands of Ko Racha Yai, Noi and Phi Phi which are quite far from land.
Of course, if you go to what the locals call the "Cape of God" terrestrial formation, you don't have to settle for just seeing the scenery.
As you enter the lighthouse from the highest point of the twist, you have the chance to discover the tools and equipment that seafarers used in the past.