Once you are picked up from your centrally located hotel on Koh Samui, you’re transferred to the pier. Board a local ferry boat for Ang Thong National Marine Park, which consists of 42 verdant islands among turquoise lagoons, reefs, and deserted sandy beaches. The ride takes you past sheer rock formations and natural caves to a couple of remote isles with stunning sea views.
Lunch is served on board the boat near tranquil Koh Paluay, with ample time for swimming, snorkeling, and sightseeing. In the afternoon, visit Mae Koh (Mother Island), which contains a beautiful beach and a mysterious emerald-green saltwater lake called Thale Nai.
Later, you'll depart the 155-square-mile (250-sq-km) national park for Nathon Pier on Koh Samui, where your tour ends with hotel drop-off.