Ranked among the best things to do in Samui, a vacation in this beach capital would not be complete without spending a day at Ang Thong National Marine Park. As an archipelago of 42 pristine islands jutting out of the ocean, it is arguably the most visually stunning marine park in all of Asia. While visiting Maya Bay where Hollywood blockbuster The Beach was filmed is a top priority for cinephiles, water sports lovers can enjoy a spot of snorkelling, diving or kayaking with the help of local tour operators. Renowned for its coral reefs and marine life heritage, what lies below the surface of this Koh Samui reserve is just as enchanting as what lies above.