Spend a day cruising through Phang Nga Bay, where hundreds of limestone karst peaks thrust up out of the sea in a variety of formations, towering over the turquoise water.
Have a lovely picnic lunch on a secluded white sand beach of Koh Kai Nok, and relax as you watch the waves roll in.
Take a speed boat to the Similan Islands, considered the top scuba-diving and snorkeling spot in Thailand and world renowned for their coral reefs and diversity of tropical fish.