Take a Snorkeling Trip Around Similan Islands
The Similan Islands is one of the best-known island groups in the Andaman Sea, largely because of the wonders that await beneath the clear-blue waters surrounding it. They're around 84 km northwest of Phuket. Snorkeling at Similan Islands is one of the best things to do in Khao Lak as the archipelago is known for its rich marine life with a complex ecosystem across the 11 islands inside the national park.
To visit Similan Islands, you are going to have to go on an organized tour that will take you from Khao Lak to the national park and sail across the archipelago, snorkeling every step of the way with a few stops to relax on the beach. It is truly, the ultimate snorkeling location in Thailand and you will have plenty of opportunities to do so with a boat trip around the Similan Islands. If you have never done snorkeling before, Similan is probably one of the best places to do so. Just be careful, you might get hooked, and sooner or late, you will be going diving and liveaboard and don't want to do anything else.