Lord Howe Island, Australia
At the southernmost coral reef in the world, more than 490 tropical and temperate species mix and mingle. And because only a limited number of guests are allowed on Australia's Lord Howe Island at a time, you can witness the spectacle in what feels like total isolation. If that's not enough, the snorkeling hot spots at this UNESCO World Heritage site are almost all found in the calm, shallow water of the miles-wide lagoon off the west coast of the island. One quick adventure out to Erscotts Hole on the inner southwest side of this reef will change your world view of snorkeling for good: Here the doubleheader wrasse, chameleon-like bluefish and almost everything else that swims is as curious about you as you are about them. Meanwhile, several resident sea turtles wander from snorkeling site to snorkeling site, almost oblivious to your presence. For big thrills, slip over to Ned's Beach at the end of the day. Locals come to this northeast-facing coast to feed fat, 3-foot-long kingfish and thick emperors in the shallows. It's one melee you'll want to witness from below. Decamp at the Capella Lodge, which has dreamy views of the lagoon. capellalodge.com


