Divers new to Koh Samui may have trouble figuring out the best dive site and may stumble trying to arrange transport. Instead of the hassle of independent arrangements, take this tour to world-class Sail Rock. The granite pinnacle rises 49 feet (15 meters) out of the water and is ideal for divers of all skill levels. The wall is covered with coral and anemones and you’ll also see barracuda, tuna, grouper, moray eels, angelfish, and more. You may even see a whale shark.