The jewel of the Honduran Caribbean floats atop the second-longest coral reef in the world. In Roatán you dive into warm, crystal-clear water among whale sharks, dolphins and shoals of colorful fish: it's one of the best diving destinations on the planet, and one of the cheapest. West Bay, with its white sand and palm trees, rivals any beach in the Caribbean. Under the water or on the sand, it's pure paradise.