PHANG NGA

Along Phang Nga’s Andaman seashore lies Khao Lak, a stunning coastline of expansive beaches that bore the brunt of the 2004 Tsunami but has greatly recovered, and -- these two islands are little visited, yet well worth the effort. The big attraction in the bay is the spectacular karst scenery that is found throughout the north of the bay.
https://www.tourismthailand.org/About-Thailand/Destination/Phang-Nga