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Tobago Cays is a marine national park — four small islets ringed by a horseshoe reef, protected from development, and home to some of the best snorkeling in the entire Caribbean. The water is shallow and warm, the sea turtles are plentiful, and the coral is in remarkable shape. Royal Clipper anchors right in the middle of it.
If there is one day on this trip where you want to be in the water, this is it.