3 Apo Island in the Philippines ThinkstockPhotos529081431.jpg

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Apo Island, a small volcanic island, is a popular destination for scuba divers. But snorkelers won’t be disappointed. They, too, get to swim with giant turtles, see stunning colorful corals, and many different kinds of fish. Go snorkeling in the protected marine sanctuary of Apo Island and around the rock formations as well.