Just off the coast, you'll find a rock formation that looks uncannily like the cartoon dog, Snoopy, which is how the island gets its name. The real magic is underwater, as it's one of the best and most accessible snorkeling spots around. You can swim or kayak the short distance from the public beach and spend hours exploring the clear, calm waters, which are teeming with colorful fish, coral, and even sea turtles.